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<p align="center">
<a href="https://github.com/trimstray/the-book-of-secret-knowledge">
<img src="https://github.com/trimstray/the-book-of-secret-knowledge/blob/master/static/img/the-book-of-secret-knowledge-preview.png" alt="Master">
</a>
</p>
<p align="center">"<i>Knowledge is powerful, be careful how you use it!</i>"</p>
<h4 align="center">A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools, and more.</h4>
<br>
<p align="center">
<a href="https://github.com/trimstray/the-book-of-secret-knowledge/pulls">
<img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg?longCache=true" alt="Pull Requests">
</a>
<a href="LICENSE.md">
<img src="https://img.shields.io/badge/License-MIT-lightgrey.svg?longCache=true" alt="MIT License">
</a>
</p>
<p align="center">
<a href="https://twitter.com/trimstray" target="_blank">
<img src="https://img.shields.io/twitter/follow/trimstray.svg?logo=twitter">
</a>
</p>
<div align="center">
<sub>Created by
<a href="https://twitter.com/trimstray">trimstray</a> and
<a href="https://github.com/trimstray/the-book-of-secret-knowledge/graphs/contributors">contributors</a>
</div>
<br>
****
## :notebook_with_decorative_cover: What is it?
This repository is a collection of various materials and tools that I use every day in my work. It contains a lot of useful information gathered in one piece. It is an invaluable source of knowledge for me that I often look back on.
## :restroom: For whom?
For everyone, really. Here everyone can find their favourite tastes. But to be perfectly honest, it is aimed towards System and Network administrators, DevOps, Pentesters, and Security Researchers.
## :information_source: Contributing
If you find something which doesn't make sense, or something doesn't seem right, please make a pull request and please add valid and well-reasoned explanations about your changes or comments.
A few simple rules for this project:
- inviting and clear
- not tiring
- useful
These below rules may be better:
- easy to contribute to (Markdown + HTML ...)
- easy to find (simple TOC, maybe it's worth extending them?)
Url marked **\*** is temporary unavailable. Please don't delete it without confirming that it has permanently expired.
Before adding a pull request, please see the **[contributing guidelines](.github/CONTRIBUTING.md)**. You should also remember about this:
```diff
+ This repository is not meant to contain everything but only good quality stuff.
```
All **suggestions/PR** are welcome!
### Code Contributors
This project exists thanks to all the people who contribute.
<a href="https://github.com/trimstray/the-book-of-secret-knowledge/graphs/contributors"><img src="https://opencollective.com/the-book-of-secret-knowledge/contributors.svg?width=890&button=false"></a>
### Financial Contributors
<p align="left">
<a href="https://opencollective.com/the-book-of-secret-knowledge" alt="Financial Contributors on Open Collective">
<img src="https://img.shields.io/opencollective/backers/the-book-of-secret-knowledge?style=for-the-badge&color=FF4500&labelColor=A9A9A9"></a>
</a>
<a href="https://opencollective.com/the-book-of-secret-knowledge" alt="Financial Contributors on Open Collective">
<img src="https://img.shields.io/opencollective/sponsors/the-book-of-secret-knowledge?style=for-the-badge&color=FF4500&labelColor=A9A9A9"></a>
</a>
</p>
## :newspaper: RSS Feed & Updates
GitHub exposes an [RSS/Atom](https://github.com/trimstray/the-book-of-secret-knowledge/commits.atom) feed of the commits, which may also be useful if you want to be kept informed about all changes.
## :ballot_box_with_check: ToDo
- [ ] Add new stuff...
- [ ] Add useful shell functions
- [ ] Add one-liners for collection tools (eg. CLI Tools)
- [ ] Sort order in lists
New items are also added on a regular basis.
## :anger: Table of Contents
Only main chapters:
- **[CLI Tools](#cli-tools-toc)**
- **[GUI Tools](#gui-tools-toc)**
- **[Web Tools](#web-tools-toc)**
- **[Systems/Services](#systemsservices-toc)**
- **[Networks](#networks-toc)**
- **[Containers/Orchestration](#containersorchestration-toc)**
- **[Manuals/Howtos/Tutorials](#manualshowtostutorials-toc)**
- **[Inspiring Lists](#inspiring-lists-toc)**
- **[Blogs/Podcasts/Videos](#blogspodcastsvideos-toc)**
- **[Hacking/Penetration Testing](#hackingpenetration-testing-toc)**
- **[Your daily knowledge and news](#your-daily-knowledge-and-news-toc)**
- **[Other Cheat Sheets](#other-cheat-sheets-toc)**
- **[One-liners](#one-liners-toc)**
- **[Shell functions](#shell-functions-toc)**
## :trident: The Book of Secret Knowledge (Chapters)
#### CLI Tools [<sup>[TOC]</sup>](#anger-table-of-contents)
##### :black_small_square: Shells
<p>
:small_orange_diamond: <a href="https://www.gnu.org/software/bash/"><b>GNU Bash</b></a> - is an sh-compatible shell that incorporates useful features from the Korn shell and C shell.<br>
:small_orange_diamond: <a href="https://www.zsh.org/"><b>Zsh</b></a> - is a shell designed for interactive use, although it is also a powerful scripting language.<br>
:small_orange_diamond: <a href="https://tcl-lang.org/"><b>tclsh</b></a> - is a very powerful cross-platform shell, suitable for a huge range of uses.<br>
:small_orange_diamond: <a href="https://github.com/Bash-it/bash-it"><b>bash-it</b></a> - is a framework for using, developing and maintaining shell scripts and custom commands.<br>
:small_orange_diamond: <a href="https://ohmyz.sh/"><b>Oh My ZSH!</b></a> - is the best framework for managing your Zsh configuration.<br>
:small_orange_diamond: <a href="https://github.com/oh-my-fish/oh-my-fish"><b>Oh My Fish</b></a> - the Fishshell framework.<br>
:small_orange_diamond: <a href="https://github.com/starship/starship"><b>Starship</b></a> - the cross-shell prompt written in Rust.<br>
:small_orange_diamond: <a href="https://github.com/romkatv/powerlevel10k"><b>powerlevel10k</b></a> - is a fast reimplementation of Powerlevel9k ZSH theme.<br>
</p>
##### :black_small_square: Shell plugins
<p>
:small_orange_diamond: <a href="https://github.com/rupa/z"><b>z</b></a> - tracks the folder you use the most and allow you to jump, without having to type the whole path.<br>
:small_orange_diamond: <a href="https://github.com/junegunn/fzf"><b>fzf</b></a> - is a general-purpose command-line fuzzy finder.<br>
:small_orange_diamond: <a href="https://github.com/zsh-users/zsh-autosuggestions"><b>zsh-autosuggestions</b></a> - Fish-like autosuggestions for Zsh.<br>
:small_orange_diamond: <a href="https://github.com/zsh-users/zsh-syntax-highlighting"><b>zsh-syntax-highlighting</b></a> - Fish shell like syntax highlighting for Zsh.<br>
:small_orange_diamond: <a href="https://github.com/unixorn/awesome-zsh-plugins"><b>Awesome ZSH Plugins</b></a> - A list of frameworks, plugins, themes and tutorials for ZSH.<br>
</p>
##### :black_small_square: Managers
<p>
:small_orange_diamond: <a href="https://midnight-commander.org/"><b>Midnight Commander</b></a> - is a visual file manager, licensed under GNU General Public License.<br>
:small_orange_diamond: <a href="https://github.com/ranger/ranger"><b>ranger</b></a> - is a VIM-inspired filemanager for the console.<br>
:small_orange_diamond: <a href="https://github.com/jarun/nnn"><b>nnn</b></a> - is a tiny, lightning fast, feature-packed file manager.<br>
:small_orange_diamond: <a href="https://www.gnu.org/software/screen/"><b>screen</b></a> - is a full-screen window manager that multiplexes a physical terminal.<br>
:small_orange_diamond: <a href="https://github.com/tmux/tmux/wiki"><b>tmux</b></a> - is a terminal multiplexer, lets you switch easily between several programs in one terminal.<br>
:small_orange_diamond: <a href="https://github.com/peikk0/tmux-cssh"><b>tmux-cssh</b></a> - is a tool to set comfortable and easy to use functionality, clustering and synchronizing tmux-sessions.<br>
</p>
##### :black_small_square: Text editors
<p>
:small_orange_diamond: <a href="http://ex-vi.sourceforge.net/"><b>vi</b></a> - is one of the most common text editors on Unix.<br>
:small_orange_diamond: <a href="https://www.vim.org/"><b>vim</b></a> - is a highly configurable text editor.<br>
:small_orange_diamond: <a href="https://www.gnu.org/software/emacs/"><b>emacs</b></a> - is an extensible, customizable, free/libre text editor, and more.<br>
:small_orange_diamond: <a href="https://github.com/zyedidia/micro"><b>micro</b></a> - is a modern and intuitive terminal-based text editor.<br>
:small_orange_diamond: <a href="https://neovim.io/"><b>neovim</b></a> - is a free open source, powerful, extensible and usable code editor.<br>
:small_orange_diamond: <a href="https://www.spacemacs.org/"><b>spacemacs</b></a> - a community-driven Emacs distribution.<br>
:small_orange_diamond: <a href="https://spacevim.org/"><b>spacevim</b></a> - a community-driven vim distribution.<br>
</p>
##### :black_small_square: Files and directories
<p>
:small_orange_diamond: <a href="https://github.com/sharkdp/fd"><b>fd</b></a> - is a simple, fast and user-friendly alternative to find.<br>
:small_orange_diamond: <a href="https://dev.yorhel.nl/ncdu"><b>ncdu</b></a> - is an easy to use, fast disk usage analyzer.<br>
</p>
##### :black_small_square: Network
<p>
:small_orange_diamond: <a href="https://www.putty.org/"><b>PuTTY</b></a> - is an SSH and telnet client, developed originally by Simon Tatham.<br>
:small_orange_diamond: <a href="https://mosh.org/"><b>Mosh</b></a> - is a SSH wrapper designed to keep a SSH session alive over a volatile connection.<br>
:small_orange_diamond: <a href="https://eternalterminal.dev/"><b>Eternal Terminal</b></a> - enables mouse-scrolling and tmux commands inside the SSH session.<br>
:small_orange_diamond: <a href="https://nmap.org/"><b>nmap</b></a> - is a free and open source (license) utility for network discovery and security auditing.<br>
:small_orange_diamond: <a href="https://github.com/zmap/zmap"><b>zmap</b></a> - is a fast single packet network scanner designed for Internet-wide network surveys.<br>
:small_orange_diamond: <a href="https://github.com/RustScan/RustScan"><b>Rust Scan</b></a> - to find all open ports faster than Nmap.<br>
:small_orange_diamond: <a href="https://github.com/robertdavidgraham/masscan"><b>masscan</b></a> - is the fastest Internet port scanner, spews SYN packets asynchronously.<br>
:small_orange_diamond: <a href="https://github.com/gvb84/pbscan"><b>pbscan</b></a> - is a faster and more efficient stateless SYN scanner and banner grabber.<br>
:small_orange_diamond: <a href="http://www.hping.org/"><b>hping</b></a> - is a command-line oriented TCP/IP packet assembler/analyzer.<br>
:small_orange_diamond: <a href="https://github.com/traviscross/mtr"><b>mtr</b></a> - is a tool that combines the functionality of the 'traceroute' and 'ping' programs in a single tool.<br>
:small_orange_diamond: <a href="https://github.com/mehrdadrad/mylg"><b>mylg</b></a> - utility which combines the functions of the different network probes in one diagnostic tool.<br>
:small_orange_diamond: <a href="http://netcat.sourceforge.net/"><b>netcat</b></a> - utility which reads and writes data across network connections, using the TCP/IP protocol.<br>
:small_orange_diamond: <a href="http://www.dest-unreach.org/socat/"><b>socat</b></a> - utility which transfers data between two objects.<br>
:small_orange_diamond: <a href="https://www.tcpdump.org/"><b>tcpdump</b></a> - is a powerful command-line packet analyzer.<br>
:small_orange_diamond: <a href="https://www.wireshark.org/docs/man-pages/tshark.html"><b>tshark</b></a> - is a tool that allows us to dump and analyze network traffic (wireshark cli).<br>
:small_orange_diamond: <a href="https://termshark.io/"><b>Termshark</b></a> - is a simple terminal user-interface for tshark.<br>
:small_orange_diamond: <a href="https://github.com/jpr5/ngrep"><b>ngrep</b></a> - is like GNU grep applied to the network layer.<br>
:small_orange_diamond: <a href="http://netsniff-ng.org/"><b>netsniff-ng</b></a> - is a Swiss army knife for your daily Linux network plumbing if you will.<br>
:small_orange_diamond: <a href="https://github.com/mechpen/sockdump"><b>sockdump</b></a> - dump unix domain socket traffic.<br>
:small_orange_diamond: <a href="https://github.com/google/stenographer"><b>stenographer</b></a> - is a packet capture solution which aims to quickly spool all packets to disk.<br>
:small_orange_diamond: <a href="https://github.com/sachaos/tcpterm"><b>tcpterm</b></a> - visualize packets in TUI.<br>
:small_orange_diamond: <a href="https://github.com/tgraf/bmon"><b>bmon</b></a> - is a monitoring and debugging tool to capture networking related statistics and prepare them visually.<br>
:small_orange_diamond: <a href="http://iptraf.seul.org/2.6/manual.html#installation"><b>iptraf-ng</b></a> - is a console-based network monitoring program for Linux that displays information about IP traffic.<br>
:small_orange_diamond: <a href="https://github.com/vergoh/vnstat"><b>vnstat</b></a> - is a network traffic monitor for Linux and BSD.<br>
:small_orange_diamond: <a href="https://iperf.fr/"><b>iPerf3</b></a> - is a tool for active measurements of the maximum achievable bandwidth on IP networks.<br>
:small_orange_diamond: <a href="https://github.com/Microsoft/Ethr"><b>ethr</b></a> - is a Network Performance Measurement Tool for TCP, UDP & HTTP.<br>
:small_orange_diamond: <a href="https://github.com/jwbensley/Etherate"><b>Etherate</b></a> - is a Linux CLI based Ethernet and MPLS traffic testing tool.<br>
:small_orange_diamond: <a href="https://github.com/mpolden/echoip"><b>echoip</b></a> - is a IP address lookup service.<br>
:small_orange_diamond: <a href="https://github.com/troglobit/nemesis"><b>Nemesis</b></a> - packet manipulation CLI tool; craft and inject packets of several protocols.<br>
:small_orange_diamond: <a href="https://github.com/packetfu/packetfu"><b>packetfu</b></a> - a mid-level packet manipulation library for Ruby.<br>
:small_orange_diamond: <a href="https://scapy.net/"><b>Scapy</b></a> - packet manipulation library; forge, send, decode, capture packets of a wide number of protocols.<br>
:small_orange_diamond: <a href="https://github.com/SecureAuthCorp/impacket"><b>impacket</b></a> - is a collection of Python classes for working with network protocols.<br>
:small_orange_diamond: <a href="https://github.com/arthepsy/ssh-audit"><b>ssh-audit</b></a> - is a tool for SSH server auditing.<br>
:small_orange_diamond: <a href="https://aria2.github.io/"><b>aria2</b></a> - is a lightweight multi-protocol & multi-source command-line download utility.<br>
:small_orange_diamond: <a href="https://github.com/x-way/iptables-tracer"><b>iptables-tracer</b></a> - observe the path of packets through the iptables chains.<br>
:small_orange_diamond: <a href="https://github.com/proabiral/inception"><b>inception</b></a> - a highly configurable tool to check for whatever you like against any number of hosts.<br>
</p>
##### :black_small_square: Network (DNS)
<p>
:small_orange_diamond: <a href="https://github.com/farrokhi/dnsdiag"><b>dnsdiag</b></a> - is a DNS diagnostics and performance measurement tools.<br>
:small_orange_diamond: <a href="https://github.com/mschwager/fierce"><b>fierce</b></a> - is a DNS reconnaissance tool for locating non-contiguous IP space.<br>
:small_orange_diamond: <a href="https://github.com/subfinder/subfinder"><b>subfinder</b></a> - is a subdomain discovery tool that discovers valid subdomains for websites.<br>
:small_orange_diamond: <a href="https://github.com/aboul3la/Sublist3r"><b>sublist3r</b></a> - is a fast subdomains enumeration tool for penetration testers.<br>
:small_orange_diamond: <a href="https://github.com/OWASP/Amass"><b>amass</b></a> - is tool that obtains subdomain names by scraping data sources, crawling web archives, and more.<br>
:small_orange_diamond: <a href="https://github.com/google/namebench"><b>namebench</b></a> - provides personalized DNS server recommendations based on your browsing history.<br>
:small_orange_diamond: <a href="https://github.com/blechschmidt/massdns"><b>massdns</b></a> - is a high-performance DNS stub resolver for bulk lookups and reconnaissance.<br>
:small_orange_diamond: <a href="https://github.com/guelfoweb/knock"><b>knock</b></a> - is a tool to enumerate subdomains on a target domain through a wordlist.<br>
:small_orange_diamond: <a href="https://github.com/DNS-OARC/dnsperf"><b>dnsperf</b></a> - DNS performance testing tools.<br>
:small_orange_diamond: <a href="https://github.com/jedisct1/dnscrypt-proxy"><b>dnscrypt-proxy 2</b></a> - a flexible DNS proxy, with support for encrypted DNS protocols.<br>
:small_orange_diamond: <a href="https://github.com/dnsdb/dnsdbq"><b>dnsdbq</b></a> - API client providing access to passive DNS database systems.<br>
:small_orange_diamond: <a href="https://github.com/looterz/grimd"><b>grimd</b></a> - fast dns proxy, built to black-hole internet advertisements and malware servers.<br>
</p>
##### :black_small_square: Network (HTTP)
<p>
:small_orange_diamond: <a href="https://curl.haxx.se/"><b>curl</b></a> - is a command line tool and library for transferring data with URLs.<br>
:small_orange_diamond: <a href="https://gitlab.com/davidjpeacock/kurly"><b>kurly</b></a> - is an alternative to the widely popular curl program, written in Golang.<br>
:small_orange_diamond: <a href="https://github.com/jakubroztocil/httpie"><b>HTTPie</b></a> - is an user-friendly HTTP client.<br>
:small_orange_diamond: <a href="https://github.com/asciimoo/wuzz"><b>wuzz</b></a> - is an interactive cli tool for HTTP inspection.<br>
:small_orange_diamond: <a href="https://github.com/summerwind/h2spec"><b>h2spec</b></a> - is a conformance testing tool for HTTP/2 implementation.<br>
:small_orange_diamond: <a href="https://github.com/gildasio/h2t"><b>h2t</b></a> - is a simple tool to help sysadmins to hardening their websites.<br>
:small_orange_diamond: <a href="https://github.com/trimstray/htrace.sh"><b>htrace.sh</b></a> - is a simple Swiss Army knife for http/https troubleshooting and profiling.<br>
:small_orange_diamond: <a href="https://github.com/reorx/httpstat"><b>httpstat</b></a> - is a tool that visualizes curl statistics in a way of beauty and clarity.<br>
:small_orange_diamond: <a href="https://github.com/gchaincl/httplab"><b>httplab</b></a> - is an interactive web server.<br>
:small_orange_diamond: <a href="https://lynx.browser.org/"><b>Lynx</b></a> - is a text browser for the World Wide Web.<br>
:small_orange_diamond: <a href="https://github.com/browsh-org/browsh/"><b>Browsh</b></a> - is a fully interactive, real-time, and modern text-based browser.<br>
:small_orange_diamond: <a href="https://github.com/dhamaniasad/HeadlessBrowsers"><b>HeadlessBrowsers</b></a> - a list of (almost) all headless web browsers in existence.<br>
:small_orange_diamond: <a href="https://httpd.apache.org/docs/2.4/programs/ab.html"><b>ab</b></a> - is a single-threaded command line tool for measuring the performance of HTTP web servers.<br>
:small_orange_diamond: <a href="https://www.joedog.org/siege-home/"><b>siege</b></a> - is an http load testing and benchmarking utility.<br>
:small_orange_diamond: <a href="https://github.com/wg/wrk"><b>wrk</b></a> - is a modern HTTP benchmarking tool capable of generating significant load.<br>
:small_orange_diamond: <a href="https://github.com/giltene/wrk2"><b>wrk2</b></a> - is a constant throughput, correct latency recording variant of wrk.<br>
:small_orange_diamond: <a href="https://github.com/tsenart/vegeta"><b>vegeta</b></a> - is a constant throughput, correct latency recording variant of wrk.<br>
:small_orange_diamond: <a href="https://github.com/codesenberg/bombardier"><b>bombardier</b></a> - is a fast cross-platform HTTP benchmarking tool written in Go.<br>
:small_orange_diamond: <a href="https://github.com/cmpxchg16/gobench"><b>gobench</b></a> - http/https load testing and benchmarking tool.<br>
:small_orange_diamond: <a href="https://github.com/rakyll/hey"><b>hey</b></a> - HTTP load generator, ApacheBench (ab) replacement, formerly known as rakyll/boom.<br>
:small_orange_diamond: <a href="https://github.com/tarekziade/boom"><b>boom</b></a> - is a script you can use to quickly smoke-test your web app deployment.<br>
:small_orange_diamond: <a href="https://github.com/shekyan/slowhttptest"><b>SlowHTTPTest</b></a> - is a tool that simulates some Application Layer Denial of Service attacks by prolonging HTTP.<br>
:small_orange_diamond: <a href="https://github.com/OJ/gobuster"><b>gobuster</b></a> - is a free and open source directory/file & DNS busting tool written in Go.<br>
:small_orange_diamond: <a href="https://github.com/ssllabs/ssllabs-scan"><b>ssllabs-scan</b></a> - command-line reference-implementation client for SSL Labs APIs.<br>
:small_orange_diamond: <a href="https://github.com/mozilla/http-observatory"><b>http-observatory</b></a> - Mozilla HTTP Observatory cli version.<br>
</p>
##### :black_small_square: SSL
<p>
:small_orange_diamond: <a href="https://www.openssl.org/"><b>openssl</b></a> - is a robust, commercial-grade, and full-featured toolkit for the TLS and SSL protocols.<br>
:small_orange_diamond: <a href="https://gnutls.org/manual/html_node/gnutls_002dcli-Invocation.html"><b>gnutls-cli</b></a> - client program to set up a TLS connection to some other computer.<br>
:small_orange_diamond: <a href="https://github.com/nabla-c0d3/sslyze"><b>sslyze
</b></a> - fast and powerful SSL/TLS server scanning library.<br>
:small_orange_diamond: <a href="https://github.com/rbsec/sslscan"><b>sslscan</b></a> - tests SSL/TLS enabled services to discover supported cipher suites.<br>
:small_orange_diamond: <a href="https://github.com/drwetter/testssl.sh"><b>testssl.sh</b></a> - testing TLS/SSL encryption anywhere on any port.<br>
:small_orange_diamond: <a href="https://github.com/mozilla/cipherscan"><b>cipherscan</b></a> - a very simple way to find out which SSL ciphersuites are supported by a target.<br>
:small_orange_diamond: <a href="http://www.tarsnap.com/spiped.html"><b>spiped</b></a> - is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses.<br>
:small_orange_diamond: <a href="https://github.com/certbot/certbot"><b>Certbot</b></a> - is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server.<br>
:small_orange_diamond: <a href="https://github.com/FiloSottile/mkcert"><b>mkcert</b></a> - simple zero-config tool to make locally trusted development certificates with any names you'd like.<br>
:small_orange_diamond: <a href="https://github.com/square/certstrap"><b>certstrap</b></a> - tools to bootstrap CAs, certificate requests, and signed certificates.<br>
:small_orange_diamond: <a href="https://github.com/yassineaboukir/sublert"><b>Sublert</b></a> - is a security and reconnaissance tool to automatically monitor new subdomains.<br>
:small_orange_diamond: <a href="https://github.com/trimstray/mkchain"><b>mkchain</b></a> - open source tool to help you build a valid SSL certificate chain.<br>
</p>
##### :black_small_square: Security
<p>
:small_orange_diamond: <a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/deployment_guide/ch-selinux"><b>SELinux</b></a> - provides a flexible Mandatory Access Control (MAC) system built into the Linux kernel.<br>
:small_orange_diamond: <a href="https://wiki.ubuntu.com/AppArmor"><b>AppArmor</b></a> - proactively protects the operating system and applications from external or internal threats.<br>
:small_orange_diamond: <a href="https://github.com/grapheneX/grapheneX"><b>grapheneX</b></a> - Automated System Hardening Framework.<br>
:small_orange_diamond: <a href="https://github.com/dev-sec/"><b>DevSec Hardening Framework</b></a> - Security + DevOps: Automatic Server Hardening.<br>
</p>
##### :black_small_square: Auditing Tools
<p>
:small_orange_diamond: <a href="https://www.ossec.net/"><b>ossec</b></a> - actively monitoring all aspects of system activity with file integrity monitoring.<br>
:small_orange_diamond: <a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security_guide/chap-system_auditing"><b>auditd</b></a> - provides a way to track security-relevant information on your system.<br>
:small_orange_diamond: <a href="https://www.nongnu.org/tiger/"><b>Tiger</b></a> - is a security tool that can be use both as a security audit and intrusion detection system.<br>
:small_orange_diamond: <a href="https://cisofy.com/lynis/"><b>Lynis</b></a> - battle-tested security tool for systems running Linux, macOS, or Unix-based operating system.<br>
:small_orange_diamond: <a href="https://github.com/rebootuser/LinEnum"><b>LinEnum</b></a> - scripted Local Linux Enumeration & Privilege Escalation Checks.<br>
:small_orange_diamond: <a href="https://github.com/installation/rkhunter"><b>Rkhunter</b></a> - scanner tool for Linux systems that scans backdoors, rootkits and local exploits on your systems.<br>
:small_orange_diamond: <a href="https://github.com/hasherezade/pe-sieve"><b>PE-sieve</b></a> - is a light-weight tool that helps to detect malware running on the system.<br>
</p>
##### :black_small_square: System Diagnostics/Debuggers
<p>
:small_orange_diamond: <a href="https://github.com/strace/strace"><b>strace</b></a> - diagnostic, debugging and instructional userspace utility for Linux.<br>
:small_orange_diamond: <a href="http://dtrace.org/blogs/about/"><b>DTrace</b></a> - is a performance analysis and troubleshooting tool.<br>
:small_orange_diamond: <a href="https://en.wikipedia.org/wiki/Ltrace"><b>ltrace</b></a> - is a library call tracer, used to trace calls made by programs to library functions.<br>
:small_orange_diamond: <a href="https://github.com/brainsmoke/ptrace-burrito"><b>ptrace-burrito</b></a> - is a friendly wrapper around ptrace.<br>
:small_orange_diamond: <a href="https://github.com/brendangregg/perf-tools"><b>perf-tools</b></a> - performance analysis tools based on Linux perf_events (aka perf) and ftrace.<br>
:small_orange_diamond: <a href="https://github.com/iovisor/bpftrace"><b>bpftrace</b></a> - high-level tracing language for Linux eBPF.<br>
:small_orange_diamond: <a href="https://github.com/draios/sysdig"><b>sysdig</b></a> - system exploration and troubleshooting tool with first class support for containers.<br>
:small_orange_diamond: <a href="http://www.valgrind.org/"><b>Valgrind</b></a> - is an instrumentation framework for building dynamic analysis tools.<br>
:small_orange_diamond: <a href="https://github.com/gperftools/gperftools"><b>gperftools</b></a> - high-performance multi-threaded malloc() implementation, plus some performance analysis tools.<br>
:small_orange_diamond: <a href="https://nicolargo.github.io/glances/"><b>glances</b></a> - cross-platform system monitoring tool written in Python.<br>
:small_orange_diamond: <a href="https://github.com/hishamhm/htop"><b>htop</b></a> - interactive text-mode process viewer for Unix systems. It aims to be a better 'top'.<br>
:small_orange_diamond: <a href="https://github.com/aristocratos/bashtop"><b>bashtop</b></a> - Linux resource monitor written in pure Bash.<br>
:small_orange_diamond: <a href="http://nmon.sourceforge.net/pmwiki.php"><b>nmon</b></a> - a single executable for performance monitoring and data analysis.<br>
:small_orange_diamond: <a href="https://www.atoptool.nl/"><b>atop</b></a> - ASCII performance monitor. Includes statistics for CPU, memory, disk, swap, network, and processes.<br>
:small_orange_diamond: <a href="https://en.wikipedia.org/wiki/Lsof"><b>lsof</b></a> - displays in its output information about files that are opened by processes.<br>
:small_orange_diamond: <a href="http://www.brendangregg.com/flamegraphs.html"><b>FlameGraph</b></a> - stack trace visualizer.<br>
:small_orange_diamond: <a href="https://github.com/zevv/lsofgraph"><b>lsofgraph</b></a> - convert Unix lsof output to a graph showing FIFO and UNIX interprocess communication.<br>
:small_orange_diamond: <a href="https://github.com/mozilla/rr"><b>rr</b></a> - is a lightweight tool for recording, replaying and debugging execution of applications.<br>
:small_orange_diamond: <a href="https://pcp.io/index.html"><b>Performance Co-Pilot</b></a> - a system performance analysis toolkit.<br>
:small_orange_diamond: <a href="https://github.com/sharkdp/hexyl"><b>hexyl</b></a> - a command-line hex viewer.<br>
</p>
##### :black_small_square: Log Analyzers
<p>
:small_orange_diamond: <a href="https://github.com/rcoh/angle-grinder"><b>angle-grinder</b></a> - slice and dice log files on the command line.<br>
:small_orange_diamond: <a href="https://lnav.org"><b>lnav</b></a> - log file navigator with search and automatic refresh.<br>
:small_orange_diamond: <a href="https://goaccess.io/"><b>GoAccess</b></a> - real-time web log analyzer and interactive viewer that runs in a terminal.<br>
:small_orange_diamond: <a href="https://github.com/lebinh/ngxtop"><b>ngxtop</b></a> - real-time metrics for nginx server.<br>
</p>
##### :black_small_square: Databases
<p>
:small_orange_diamond: <a href="https://github.com/xo/usql"><b>usql</b></a> - universal command-line interface for SQL databases.<br>
:small_orange_diamond: <a href="https://github.com/dbcli/pgcli"><b>pgcli</b></a> - postgres CLI with autocompletion and syntax highlighting.<br>
:small_orange_diamond: <a href="https://github.com/dbcli/mycli"><b>mycli</b></a> - terminal client for MySQL with autocompletion and syntax highlighting.<br>
:small_orange_diamond: <a href="https://github.com/dbcli/litecli"><b>litecli</b></a> - SQLite CLI with autocompletion and syntax highlighting.<br>
:small_orange_diamond: <a href="https://github.com/dbcli/mssql-cli"><b>mssql-cli</b></a> - SQL Server CLI with autocompletion and syntax highlighting.<br>
:small_orange_diamond: <a href="https://github.com/osquery/osquery"><b>OSQuery</b></a> - is a SQL powered operating system instrumentation, monitoring, and analytics framework.<br>
:small_orange_diamond: <a href="https://github.com/ankane/pgsync"><b>pgsync</b></a> - sync data from one Postgres database to another.<br>
:small_orange_diamond: <a href="https://github.com/laixintao/iredis"><b>iredis</b></a> - a terminal client for redis with autocompletion and syntax highlighting.<br>
</p>
##### :black_small_square: TOR
<p>
:small_orange_diamond: <a href="https://github.com/GouveaHeitor/nipe"><b>Nipe</b></a> - script to make Tor Network your default gateway.<br>
:small_orange_diamond: <a href="https://github.com/trimstray/multitor"><b>multitor</b></a> - a tool that lets you create multiple TOR instances with a load-balancing.<br>
</p>
##### :black_small_square: Messengers/IRC Clients
<p>
:small_orange_diamond: <a href="https://irssi.org"><b>Irssi</b></a> - is a free open source terminal based IRC client.<br>
:small_orange_diamond: <a href="https://weechat.org/"><b>WeeChat</b></a> - is an extremely extensible and lightweight IRC client.<br>
</p>
##### :black_small_square: Productivity
<p>
:small_orange_diamond: <a href="https://taskwarrior.org"><b>taskwarrior</b></a> - task management system, todo list <br>
</p>
##### :black_small_square: Other
<p>
:small_orange_diamond: <a href="https://github.com/skx/sysadmin-util"><b>sysadmin-util</b></a> - tools for Linux/Unix sysadmins.<br>
:small_orange_diamond: <a href="http://inotify.aiken.cz/"><b>incron</b></a> - is an inode-based filesystem notification technology.<br>
:small_orange_diamond: <a href="https://github.com/axkibe/lsyncd"><b>lsyncd</b></a> - synchronizes local directories with remote targets (Live Syncing Daemon).<br>
:small_orange_diamond: <a href="https://github.com/rgburke/grv"><b>GRV</b></a> - is a terminal based interface for viewing Git repositories.<br>
:small_orange_diamond: <a href="https://jonas.github.io/tig/"><b>Tig</b></a> - text-mode interface for Git.<br>
:small_orange_diamond: <a href="https://github.com/tldr-pages/tldr"><b>tldr</b></a> - simplified and community-driven man pages.<br>
:small_orange_diamond: <a href="https://github.com/mholt/archiver"><b>archiver</b></a> - easily create and extract .zip, .tar, .tar.gz, .tar.bz2, .tar.xz, .tar.lz4, .tar.sz, and .rar.<br>
:small_orange_diamond: <a href="https://github.com/tj/commander.js"><b>commander.js</b></a> - minimal CLI creator in JavaScript.<br>
:small_orange_diamond: <a href="https://github.com/tomnomnom/gron"><b>gron</b></a> - make JSON greppable!<br>
:small_orange_diamond: <a href="https://github.com/itchyny/bed"><b>bed</b></a> - binary editor written in Go.<br>
</p>
#### GUI Tools [<sup>[TOC]</sup>](#anger-table-of-contents)
##### :black_small_square: Terminal emulators
<p>
:small_orange_diamond: <a href="https://github.com/Guake/guake"><b>Guake</b></a> - is a dropdown terminal made for the GNOME desktop environment.<br>
:small_orange_diamond: <a href="https://gnometerminator.blogspot.com/p/introduction.html"><b>Terminator</b></a> - is based on GNOME Terminal, useful features for sysadmins and other users.<br>
:small_orange_diamond: <a href="https://sw.kovidgoyal.net/kitty/"><b>Kitty</b></a> - is a GPU based terminal emulator that supports smooth scrolling and images.<br>
:small_orange_diamond: <a href="https://github.com/alacritty/alacritty"><b>Alacritty</b></a> - is a fast, cross-platform, OpenGL terminal emulator.<br>
</p>
##### :black_small_square: Network
<p>
:small_orange_diamond: <a href="https://www.wireshark.org/"><b>Wireshark</b></a> - is the world’s foremost and widely-used network protocol analyzer.<br>
:small_orange_diamond: <a href="https://www.ettercap-project.org/"><b>Ettercap</b></a> - is a comprehensive network monitor tool.<br>
:small_orange_diamond: <a href="https://etherape.sourceforge.io/"><b>EtherApe</b></a> - is a graphical network monitoring solution.<br>
:small_orange_diamond: <a href="https://packetsender.com/"><b>Packet Sender</b></a> - is a networking utility for packet generation and built-in UDP/TCP/SSL client and servers.<br>
:small_orange_diamond: <a href="https://ostinato.org/"><b>Ostinato</b></a> - is a packet crafter and traffic generator.<br>
:small_orange_diamond: <a href="https://jmeter.apache.org/"><b>JMeter™</b></a> - open source software to load test functional behavior and measure performance.<br>
:small_orange_diamond: <a href="https://github.com/locustio/locust"><b>locust</b></a> - scalable user load testing tool written in Python.<br>
</p>
##### :black_small_square: Browsers
<p>
:small_orange_diamond: <a href="https://www.torproject.org/"><b>TOR Browser</b></a> - protect your privacy and defend yourself against network surveillance and traffic analysis.<br>
</p>
##### :black_small_square: Password Managers
<p>
:small_orange_diamond: <a href="https://keepassxc.org/"><b>KeePassXC</b></a> - store your passwords safely and auto-type them into your everyday websites and apps.<br>
:small_orange_diamond: <a href="https://bitwarden.com/"><b>Bitwarden</b></a> - open source password manager with built-in sync.<br>
</p>
##### :black_small_square: Messengers/IRC Clients
<p>
:small_orange_diamond: <a href="https://hexchat.github.io/index.html"><b>HexChat</b></a> - is an IRC client based on XChat.<br>
:small_orange_diamond: <a href="https://pidgin.im/"><b>Pidgin</b></a> - is an easy to use and free chat client used by millions.<br>
</p>
##### :black_small_square: Messengers (end-to-end encryption)
<p>
:small_orange_diamond: <a href="https://www.signal.org/"><b>Signal</b></a> - is an encrypted communications app.<br>
:small_orange_diamond: <a href="https://wire.com/en/"><b>Wire</b></a> - secure messaging, file sharing, voice calls and video conferences. All protected with end-to-end encryption.<br>
:small_orange_diamond: <a href="https://github.com/prof7bit/TorChat"><b>TorChat</b></a> - decentralized anonymous instant messenger on top of Tor Hidden Services.<br>
:small_orange_diamond: <a href="https://matrix.org/"><b>Matrix</b></a> - an open network for secure, decentralized, real-time communication.<br>
</p>
##### :black_small_square: Text editors
<p>
:small_orange_diamond: <a href="https://www.sublimetext.com/3"><b>Sublime Text</b></a> - is a lightweight, cross-platform code editor known for its speed, ease of use.<br>
:small_orange_diamond: <a href="https://code.visualstudio.com/"><b>Visual Studio Code</b></a> - an open-source and free source code editor developed by Microsoft.<br>
:small_orange_diamond: <a href="https://atom.io/"><b>Atom</b></a> - a hackable text editor for the 21st Century.<br>
</p>
#### Web Tools [<sup>[TOC]</sup>](#anger-table-of-contents)
##### :black_small_square: Browsers
<p>
:small_orange_diamond: <a href="https://www.ssllabs.com/ssltest/viewMyClient.html"><b>SSL/TLS Capabilities of Your Browser</b></a> - test your browser's SSL implementation.<br>
:small_orange_diamond: <a href="https://caniuse.com/"><b>Can I use</b></a> - provides up-to-date browser support tables for support of front-end web technologies.<br>
:small_orange_diamond: <a href="https://panopticlick.eff.org/"><b>Panopticlick 3.0</b></a> - is your browser safe against tracking?<br>
:small_orange_diamond: <a href="https://privacy.net/analyzer/"><b>Privacy Analyzer</b></a> - see what data is exposed from your browser.<br>
:small_orange_diamond: <a href="https://browserleaks.com/"><b>Web Browser Security</b></a> - it's all about Web Browser fingerprinting.<br>
:small_orange_diamond: <a href="https://www.howsmyssl.com/"><b>How's My SSL?</b></a> - help a web server developer learn what real world TLS clients were capable of.<br>
:small_orange_diamond: <a href="https://suche.org/sslClientInfo"><b>sslClientInfo</b></a> - client test (incl TLSv1.3 information).<br>
</p>
##### :black_small_square: SSL/Security
<p>
:small_orange_diamond: <a href="https://www.ssllabs.com/ssltest/"><b>SSLLabs Server Test</b></a> - performs a deep analysis of the configuration of any SSL web server.<br>
:small_orange_diamond: <a href="https://dev.ssllabs.com/ssltest/"><b>SSLLabs Server Test (DEV)</b></a> - performs a deep analysis of the configuration of any SSL web server.<br>
:small_orange_diamond: <a href="https://www.immuniweb.com/ssl/"><b>ImmuniWeb® SSLScan</b></a> - test SSL/TLS (PCI DSS, HIPAA and NIST).<br>
:small_orange_diamond: <a href="https://www.jitbit.com/sslcheck/"><b>SSL Check</b></a> - scan your website for non-secure content.<br>
:small_orange_diamond: <a href="http://www.ssltools.com"><b>SSL Scanner</b></a> - analyze website security.<br>
:small_orange_diamond: <a href="https://cryptcheck.fr/"><b>CryptCheck</b></a> - test your TLS server configuration (e.g. ciphers).<br>
:small_orange_diamond: <a href="https://urlscan.io/"><b>urlscan.io</b></a> - service to scan and analyse websites.<br>
:small_orange_diamond: <a href="https://report-uri.com/home/tools"><b>Report URI</b></a> - monitoring security policies like CSP and HPKP.<br>
:small_orange_diamond: <a href="https://csp-evaluator.withgoogle.com/"><b>CSP Evaluator</b></a> - allows developers and security experts to check if a Content Security Policy.<br>
:small_orange_diamond: <a href="https://uselesscsp.com/"><b>Useless CSP</b></a> - public list about CSP in some big players (might make them care a bit more).<br>
:small_orange_diamond: <a href="https://whynohttps.com/"><b>Why No HTTPS?</b></a> - top 100 websites by Alexa rank not automatically redirecting insecure requests.<br>
:small_orange_diamond: <a href="https://ciphersuite.info/"><b>TLS Cipher Suite Search</b></a>- cipher suite search engine.<br>
:small_orange_diamond: <a href="https://github.com/RaymiiOrg/cipherli.st"><b>cipherli.st</b></a> - strong ciphers for Apache, Nginx, Lighttpd, and more.<b>*</b><br>
:small_orange_diamond: <a href="https://2ton.com.au/dhtool/"><b>dhtool</b></a> - public Diffie-Hellman parameter service/tool.<br>
:small_orange_diamond: <a href="https://badssl.com/"><b>badssl.com</b></a> - memorable site for testing clients against bad SSL configs.<br>
:small_orange_diamond: <a href="https://tlsfun.de/"><b>tlsfun.de</b></a> - registered for various tests regarding the TLS/SSL protocol.<br>
:small_orange_diamond: <a href="https://sslmate.com/caa/"><b>CAA Record Helper</b></a> - generate a CAA policy.<br>
:small_orange_diamond: <a href="https://ccadb.org/resources"><b>Common CA Database</b></a> - repository of information about CAs, and their root and intermediate certificates.<br>
:small_orange_diamond: <a href="https://certstream.calidog.io/"><b>CERTSTREAM</b></a> - real-time certificate transparency log update stream.<br>
:small_orange_diamond: <a href="https://crt.sh/"><b>crt.sh</b></a> - discovers certificates by continually monitoring all of the publicly known CT.<br>
:small_orange_diamond: <a href="https://www.hardenize.com/"><b>Hardenize</b></a> - deploy the security standards.<br>
:small_orange_diamond: <a href="https://cryptcheck.fr/suite/"><b>Cipher suite compatibility</b></a> - test TLS cipher suite compatibility.<br>
:small_orange_diamond: <a href="https://www.urlvoid.com/"><b>urlvoid</b></a> - this service helps you detect potentially malicious websites.<br>
:small_orange_diamond: <a href="https://securitytxt.org/"><b>security.txt</b></a> - a proposed standard (generator) which allows websites to define security policies.<br>
:small_orange_diamond: <a href="https://github.com/mozilla/ssl-config-generator"><b>ssl-config-generator</b></a> - help you follow the Mozilla Server Side TLS configuration guidelines.<br>
</p>
##### :black_small_square: HTTP Headers & Web Linters
<p>
:small_orange_diamond: <a href="https://securityheaders.com/"><b>Security Headers</b></a> - analyse the HTTP response headers (with rating system to the results).<br>
:small_orange_diamond: <a href="https://observatory.mozilla.org/"><b>Observatory by Mozilla</b></a> - set of tools to analyze your website.<br>
:small_orange_diamond: <a href="https://webhint.io/"><b>webhint</b></a> - is a linting tool that will help you with your site's accessibility, speed, security, and more.<br>
</p>
##### :black_small_square: DNS
<p>
:small_orange_diamond: <a href="http://viewdns.info/"><b>ViewDNS</b></a> - one source for free DNS related tools and information.<br>
:small_orange_diamond: <a href="https://dnslookup.org/"><b>DNSLookup</b></a> - is an advanced DNS lookup tool.<br>
:small_orange_diamond: <a href="https://dnslytics.com/"><b>DNSlytics</b></a> - online DNS investigation tool.<br>
:small_orange_diamond: <a href="https://dnsspy.io/"><b>DNS Spy</b></a> - monitor, validate and verify your DNS configurations.<br>
:small_orange_diamond: <a href="https://zonemaster.iis.se/en/"><b>Zonemaster</b></a> - helps you to control how your DNS works.<br>
:small_orange_diamond: <a href="http://leafdns.com/"><b>Leaf DNS</b></a> - comprehensive DNS tester.<br>
:small_orange_diamond: <a href="https://findsubdomains.com/"><b>Find subdomains online</b></a> - find subdomains for security assessment penetration test.<br>
:small_orange_diamond: <a href="https://dnsdumpster.com/"><b>DNSdumpster</b></a> - dns recon & research, find & lookup dns records.<br>
:small_orange_diamond: <a href="https://dnstable.com/"><b>DNS Table online</b></a> - search for DNS records by domain, IP, CIDR, ISP.<br>
:small_orange_diamond: <a href="https://intodns.com/"><b>intoDNS</b></a> - DNS and mail server health checker.<br>
:small_orange_diamond: <a href="http://www.zonecut.net/dns/"><b>DNS Bajaj</b></a> - check the delegation of your domain.<br>
:small_orange_diamond: <a href="https://www.buddyns.com/delegation-lab/"><b>BuddyDNS Delegation LAB</b></a> - check, trace and visualize delegation of your domain.<br>
:small_orange_diamond: <a href="https://dnssec-debugger.verisignlabs.com/"><b>dnssec-debugger</b></a> - DS or DNSKEY records validator.<br>
:small_orange_diamond: <a href="http://ptrarchive.com/"><b>PTRarchive.com</b></a> - this site is responsible for the safekeeping of historical reverse DNS records.<br>
:small_orange_diamond: <a href="http://xip.io/"><b>xip.io</b></a> - wildcard DNS for everyone.<br>
:small_orange_diamond: <a href="https://nip.io/"><b>nip.io</b></a> - dead simple wildcard DNS for any IP Address.<br>
:small_orange_diamond: <a href="https://ceipam.eu/en/dnslookup.php"><b>dnslookup (ceipam)</b></a> - one of the best DNS propagation checker (and not only).<br>
:small_orange_diamond: <a href="https://whatsmydns.com"><b>What's My DNS</b></a> - DNS propagation checking tool.<br>
:small_orange_diamond: <a href="https://blog.erbbysam.com/index.php/2019/02/09/dnsgrep/"><b>DNSGrep</b></a> - quickly searching large DNS datasets.<br>
</p>
##### :black_small_square: Mail
<p>
:small_orange_diamond: <a href="https://luxsci.com/smtp-tls-checker"><b>smtp-tls-checker</b></a> - check an email domain for SMTP TLS support.<br>
:small_orange_diamond: <a href="https://mxtoolbox.com/SuperTool.aspx"><b>MX Toolbox</b></a> - all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.<br>
:small_orange_diamond: <a href="https://www.checktls.com/index.html"><b>Secure Email</b></a> - complete email test tools for email technicians.<br>
:small_orange_diamond: <a href="http://www.blacklistalert.org/"><b>blacklistalert</b></a> - checks to see if your domain is on a Real Time Spam Blacklist.<br>
:small_orange_diamond: <a href="http://multirbl.valli.org/"><b>MultiRBL</b></a> - complete IP check for sending Mailservers.<br>
:small_orange_diamond: <a href="https://dkimvalidator.com/"><b>DKIM SPF & Spam Assassin Validator</b></a> - checks mail authentication and scores messages with Spam Assassin.<br>
</p>
##### :black_small_square: Encoders/Decoders and Regex testing
<p>
:small_orange_diamond: <a href="https://www.url-encode-decode.com/"><b>URL Encode/Decode</b></a> - tool from above to either encode or decode a string of text.<br>
:small_orange_diamond: <a href="https://uncoder.io/"><b>Uncoder</b></a> - the online translator for search queries on log data.<br>
:small_orange_diamond: <a href="https://regex101.com/"><b>Regex101</b></a> - online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript.<br>
:small_orange_diamond: <a href="https://regexr.com/"><b>RegExr</b></a> - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).<br>
:small_orange_diamond: <a href="https://www.regextester.com/"><b>RegEx Testing</b></a> - online regex testing tool.<br>
:small_orange_diamond: <a href="https://www.regexpal.com/"><b>RegEx Pal</b></a> - online regex testing tool + other tools.<br>
:small_orange_diamond: <a href="https://gchq.github.io/CyberChef/"><b>The Cyber Swiss Army Knife</b></a> - a web app for encryption, encoding, compression and data analysis.<br>
</p>
##### :black_small_square: Net-tools
<p>
:small_orange_diamond: <a href="https://toolbar.netcraft.com/site_report"><b>Netcraft</b></a> - detailed report about the site, helping you to make informed choices about their integrity.<b>*</b><br>
:small_orange_diamond: <a href="https://atlas.ripe.net/"><b>RIPE NCC Atlas</b></a> - a global, open, distributed Internet measurement platform.<br>
:small_orange_diamond: <a href="https://www.robtex.com/"><b>Robtex</b></a> - uses various sources to gather public information about IP numbers, domain names, host names, etc.<br>
:small_orange_diamond: <a href="https://securitytrails.com/"><b>Security Trails</b></a> - APIs for Security Companies, Researchers and Teams.<br>
:small_orange_diamond: <a href="https://tools.keycdn.com/curl"><b>Online Curl</b></a> - curl test, analyze HTTP Response Headers.<br>
:small_orange_diamond: <a href="https://extendsclass.com/"><b>Online Tools for Developers</b></a> - HTTP API tools, testers, encoders, converters, formatters, and other tools.<br>
:small_orange_diamond: <a href="https://ping.eu/"><b>Ping.eu</b></a> - online Ping, Traceroute, DNS lookup, WHOIS and others.<br>
:small_orange_diamond: <a href="https://network-tools.com/"><b>Network-Tools</b></a> - network tools for webmasters, IT technicians & geeks.<br>
:small_orange_diamond: <a href="https://bgpview.io/"><b>BGPview</b></a> - search for any ASN, IP, Prefix or Resource name.<br>
:small_orange_diamond: <a href="https://isbgpsafeyet.com/"><b>Is BGP safe yet?</b></a> - check BGP (RPKI) security of ISPs and other major Internet players.<br>
:small_orange_diamond: <a href="https://riseup.net/"><b>Riseup</b></a> - provides online communication tools for people and groups working on liberatory social change.<br>
:small_orange_diamond: <a href="https://www.virustotal.com/gui/home/upload"><b>VirusTotal</b></a> - analyze suspicious files and URLs to detect types of malware.<br>
</p>
##### :black_small_square: Privacy
<p>
:small_orange_diamond: <a href="https://www.privacytools.io/"><b>privacytools.io</b></a> - provides knowledge and tools to protect your privacy against global mass surveillance.<br>
:small_orange_diamond: <a href="https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Test+Servers"><b>DNS Privacy Test Servers</b></a> - DNS privacy recursive servers list (with a 'no logging' policy).<br>
</p>
##### :black_small_square: Code parsers/playgrounds
<p>
:small_orange_diamond: <a href="https://www.shellcheck.net/"><b>ShellCheck</b></a> - finds bugs in your shell scripts.<br>
:small_orange_diamond: <a href="https://explainshell.com/"><b>explainshell</b></a> - get interactive help texts for shell commands.<br>
:small_orange_diamond: <a href="https://jsbin.com/?html,output"><b>jsbin</b></a> - live pastebin for HTML, CSS & JavaScript, and more.<br>
:small_orange_diamond: <a href="https://codesandbox.io/"><b>CodeSandbox</b></a> - online code editor for web application development.<br>
:small_orange_diamond: <a href="http://sandbox.onlinephpfunctions.com/"><b>PHP Sandbox</b></a> - test your PHP code with this code tester.<br>
:small_orange_diamond: <a href="https://www.repl.it/"><b>Repl.it</b></a> - an instant IDE to learn, build, collaborate, and host all in one place.<br>
:small_orange_diamond: <a href="http://www.vclfiddle.net/"><b>vclFiddle</b></a> - is an online tool for experimenting with the Varnish Cache VCL.<br>
</p>
##### :black_small_square: Performance
<p>
:small_orange_diamond: <a href="https://gtmetrix.com/"><b>GTmetrix</b></a> - analyze your site’s speed and make it faster.<br>
:small_orange_diamond: <a href="https://performance.sucuri.net/"><b>Sucuri loadtimetester</b></a> - test here the
performance of any of your sites from across the globe.<br>
:small_orange_diamond: <a href="https://tools.pingdom.com/"><b>Pingdom Tools</b></a> - analyze your site’s speed around the world.<br>
:small_orange_diamond: <a href="https://pingme.io/"><b>PingMe.io</b></a> - run website latency tests across multiple geographic regions.<br>
:small_orange_diamond: <a href="https://developers.google.com/speed/pagespeed/insights/"><b>PageSpeed Insights</b></a> - analyze your site’s speed and make it faster.<br>
:small_orange_diamond: <a href="https://web.dev/"><b>web.dev</b></a> - helps developers like you learn and apply the web's modern capabilities to your own sites and apps.<br>
:small_orange_diamond: <a href="https://github.com/GoogleChrome/lighthouse"><b>Lighthouse</b></a> - automated auditing, performance metrics, and best practices for the web.<br>
</p>
##### :black_small_square: Mass scanners (search engines)
<p>
:small_orange_diamond: <a href="https://censys.io/"><b>Censys</b></a> - platform that helps information security practitioners discover, monitor, and analyze devices.<br>
:small_orange_diamond: <a href="https://www.shodan.io/"><b>Shodan</b></a> - the world's first search engine for Internet-connected devices.<br>
:small_orange_diamond: <a href="https://2000.shodan.io/#/"><b>Shodan 2000</b></a> - this tool looks for randomly generated data from Shodan.<br>
:small_orange_diamond: <a href="https://viz.greynoise.io/table"><b>GreyNoise</b></a> - mass scanner such as Shodan and Censys.<br>
:small_orange_diamond: <a href="https://www.zoomeye.org/"><b>ZoomEye</b></a> - search engine for cyberspace that lets the user find specific network components.<br>
:small_orange_diamond: <a href="https://netograph.io/"><b>netograph</b></a> - tools to monitor and understand deep structure of the web.<br>
:small_orange_diamond: <a href="https://fofa.so/"><b>FOFA</b></a> - is a cyberspace search engine.<br>
:small_orange_diamond: <a href="https://www.onyphe.io/"><b>onyphe</b></a> - is a search engine for open-source and cyber threat intelligence data collected.<br>
:small_orange_diamond: <a href="https://intelx.io/"><b>IntelligenceX</b></a> - is a search engine and data archive.<br>
:small_orange_diamond: <a href="https://app.binaryedge.io/"><b>binaryedge</b></a> - it scan the entire internet space and create real-time threat intelligence streams and reports.<br>
:small_orange_diamond: <a href="https://spyse.com/"><b>Spyse</b></a> - Internet assets registry: networks, threats, web objects, etc.<br>
:small_orange_diamond: <a href="https://wigle.net/"><b>wigle</b></a> - is a submission-based catalog of wireless networks. All the networks. Found by Everyone.<br>
:small_orange_diamond: <a href="https://publicwww.com/"><b>PublicWWW</b></a> - find any alphanumeric snippet, signature or keyword in the web pages HTML, JS and CSS code.<br>
:small_orange_diamond: <a href="https://inteltechniques.com/index.html"><b>IntelTechniques</b></a> - this repository contains hundreds of online search utilities.<br>
:small_orange_diamond: <a href="https://hunter.io/"><b>hunter</b></a> - lets you find email addresses in seconds and connect with the people that matter for your business.<br>
:small_orange_diamond: <a href="https://ghostproject.fr/"><b>GhostProject?</b></a> - search by full email address or username.<br>
:small_orange_diamond: <a href="https://www.databreaches.live/"><b>databreaches</b></a> - was my email affected by data breach?<br>
:small_orange_diamond: <a href="https://weleakinfo.com"><b>We Leak Info</b></a> - world's fastest and largest data breach search engine.<br>
:small_orange_diamond: <a href="https://pulsedive.com/"><b>Pulsedive</b></a> - scans of malicious URLs, IPs, and domains, including port scans and web requests.<br>
:small_orange_diamond: <a href="https://buckets.grayhatwarfare.com/"><b>Buckets by Grayhatwarfar</b></a> - database with public search for Open Amazon S3 Buckets and their contents.<br>
:small_orange_diamond: <a href="https://vigilante.pw/"><b>Vigilante.pw</b></a> - the breached database directory.<br>
:small_orange_diamond: <a href="https://builtwith.com/"><b>builtwith</b></a> - find out what websites are built with.<br>
:small_orange_diamond: <a href="https://nerdydata.com/"><b>NerdyData</b></a> - search the web's source code for technologies, across millions of sites.<br>
:small_orange_diamond: <a href="http://zorexeye.com/"><b>zorexeye</b></a> - search for sites, images, apps, softwares & more.<br>
:small_orange_diamond: <a href="https://www.mmnt.net/"><b>Mamont's open FTP Index</b></a> - if a target has an open FTP site with accessible content it will be listed here.<br>
:small_orange_diamond: <a href="https://osintframework.com/"><b>OSINT Framework</b></a> - focused on gathering information from free tools or resources.<br>
:small_orange_diamond: <a href="https://www.maltiverse.com/search"><b>maltiverse</b></a> - is a service oriented to cybersecurity analysts for the advanced analysis of indicators of compromise.<br>
:small_orange_diamond: <a href="https://leakedsource.ru/main/"><b>Leaked Source</b></a> - is a collaboration of data found online in the form of a lookup.<br>
:small_orange_diamond: <a href="https://search.weleakinfo.com/"><b>We Leak Info</b></a> - to help everyday individuals secure their online life, avoiding getting hacked.<br>
:small_orange_diamond: <a href="https://pipl.com/"><b>pipl</b></a> - is the place to find the person behind the email address, social username or phone number.<br>
:small_orange_diamond: <a href="https://abuse.ch/"><b>abuse.ch</b></a> - is operated by a random swiss guy fighting malware for non-profit.<br>
:small_orange_diamond: <a href="http://malc0de.com/database/"><b>malc0de</b></a> - malware search engine.<br>
:small_orange_diamond: <a href="https://cybercrime-tracker.net/index.php"><b>Cybercrime Tracker</b></a> - monitors and tracks various malware families that are used to perpetrate cyber crimes.<br>
:small_orange_diamond: <a href="https://github.com/eth0izzle/shhgit/"><b>shhgit</b></a> - find GitHub secrets in real time.<br>
:small_orange_diamond: <a href="https://searchcode.com/"><b>searchcode</b></a> - helping you find real world examples of functions, API's and libraries.<br>
:small_orange_diamond: <a href="http://www.insecam.org/"><b>Insecam</b></a> - the world biggest directory of online surveillance security cameras.<br>
:small_orange_diamond: <a href="http://index-of.es/"><b>index-of</b></a> - contains great stuff like: security, hacking, reverse engineering, cryptography, programming etc.<br>
:small_orange_diamond: <a href="https://opendata.rapid7.com/"><b>Rapid7 Labs Open Data</b></a> - is a great resources of datasets from Project Sonar.<br>
:small_orange_diamond: <a href="https://webtechsurvey.com/common-response-headers"><b>Common Response Headers</b></a> - the largest database of HTTP response headers.<br>
</p>
##### :black_small_square: Generators
<p>
:small_orange_diamond: <a href="https://thispersondoesnotexist.com/"><b>thispersondoesnotexist</b></a> - generate fake faces in one click - endless possibilities.<br>
:small_orange_diamond: <a href="https://generated.photos"><b>AI Generated Photos</b></a> - 100.000 AI generated faces.<br>
:small_orange_diamond: <a href="https://www.fakenamegenerator.com/"><b>fakenamegenerator</b></a> - your randomly generated identity.<br>
:small_orange_diamond: <a href="https://tools.intigriti.io/redirector/"><b>Intigriti Redirector</b></a> - open redirect/SSRF payload generator.<br>
</p>
##### :black_small_square: Passwords
<p>
:small_orange_diamond: <a href="https://haveibeenpwned.com/"><b>have i been pwned?</b></a> - check if you have an account that has been compromised in a data breach.<br>
:small_orange_diamond: <a href="https://www.dehashed.com/"><b>dehashed</b></a> - is a hacked database search engine.<br>
:small_orange_diamond: <a href="https://leakedsource.ru/"><b>Leaked Source</b></a> - is a collaboration of data found online in the form of a lookup.<br>
</p>
##### :black_small_square: CVE/Exploits databases
<p>
:small_orange_diamond: <a href="https://cve.mitre.org/"><b>CVE Mitre</b></a> - list of publicly known cybersecurity vulnerabilities.<br>
:small_orange_diamond: <a href="https://www.cvedetails.com/"><b>CVE Details</b></a> - CVE security vulnerability advanced database.<br>
:small_orange_diamond: <a href="https://www.exploit-db.com/"><b>Exploit DB</b></a> - CVE compliant archive of public exploits and corresponding vulnerable software.<br>
:small_orange_diamond: <a href="https://0day.today/"><b>0day.today</b></a> - exploits market provides you the possibility to buy/sell zero-day exploits.<br>
:small_orange_diamond: <a href="https://sploitus.com/"><b>sploitus</b></a> - the exploit and tools database.<br>
:small_orange_diamond: <a href="https://cxsecurity.com/exploit/"><b>cxsecurity</b></a> - free vulnerability database.<br>
:small_orange_diamond: <a href="https://www.vulncode-db.com/"><b>Vulncode-DB</b></a> - is a database for vulnerabilities and their corresponding source code if available.<br>
:small_orange_diamond: <a href="https://cveapi.com/"><b>cveapi</b></a> - free API for CVE data.<br>
</p>
##### :black_small_square: Mobile apps scanners
<p>
:small_orange_diamond: <a href="https://www.immuniweb.com/mobile/"><b>ImmuniWeb® Mobile App Scanner</b></a> - test security and privacy of mobile apps (iOS & Android).<br>
:small_orange_diamond: <a href="https://vulnerabilitytest.quixxi.com/"><b>Quixxi</b></a> - free Mobile App Vulnerability Scanner for Android & iOS.<br>
:small_orange_diamond: <a href="https://www.ostorlab.co/scan/mobile/"><b>Ostorlab</b></a> - analyzes mobile application to identify vulnerabilities and potential weaknesses.<br>
</p>
##### :black_small_square: Private Search Engines
<p>
:small_orange_diamond: <a href="https://www.startpage.com/"><b>Startpage</b></a> - the world's most private search engine.<br>
:small_orange_diamond: <a href="https://searx.me/"><b>searX</b></a> - a privacy-respecting, hackable metasearch engine.<br>
:small_orange_diamond: <a href="https://darksearch.io/"><b>darksearch</b></a> - the 1st real Dark Web search engine.<br>
:small_orange_diamond: <a href="https://www.qwant.com/"><b>Qwant</b></a> - the search engine that respects your privacy.<br>
:small_orange_diamond: <a href="https://duckduckgo.com/"><b>DuckDuckGo</b></a> - the search engine that doesn't track you.<br>
:small_orange_diamond: <a href="https://swisscows.com/"><b>Swisscows</b></a> - privacy safe web search<br>
:small_orange_diamond: <a href="https://search.disconnect.me/"><b>Disconnect</b></a> - the search engine that anonymizes your searches.<br>
:small_orange_diamond: <a href="https://metager.org/"><b>MetaGer</b></a> - the search engine that uses anonymous proxy and hidden Tor branches.<br>
</p>
##### :black_small_square: Secure Webmail Providers
<p>
:small_orange_diamond: <a href="https://countermail.com/"><b>CounterMail</b></a> - online email service, designed to provide maximum security and privacy.<br>
:small_orange_diamond: <a href="http://mail2tor.com/"><b>Mail2Tor</b></a> - is a Tor Hidden Service that allows anyone to send and receive emails anonymously.<br>
:small_orange_diamond: <a href="https://tutanota.com/"><b>Tutanota</b></a> - is the world's most secure email service and amazingly easy to use.<br>
:small_orange_diamond: <a href="https://protonmail.com/"><b>Protonmail</b></a> - is the world's largest secure email service, developed by CERN and MIT scientists.<br>
:small_orange_diamond: <a href="https://www.startmail.com/en/"><b>Startmail</b></a> - private & encrypted email made easy.<br>
</p>
##### :black_small_square: Crypto
<p>
:small_orange_diamond: <a href="https://keybase.io/"><b>Keybase</b></a> - it's open source and powered by public-key cryptography.<br>
</p>
##### :black_small_square: PGP Keyservers
<p>
:small_orange_diamond: <a href="https://keyserver.ubuntu.com/"><b>SKS OpenPGP Key server</b></a> - services for the SKS keyservers used by OpenPGP.<br>
</p>
#### Systems/Services [<sup>[TOC]</sup>](#anger-table-of-contents)
##### :black_small_square: Operating Systems
<p>
:small_orange_diamond: <a href="http://www.slackware.com/"><b>Slackware</b></a> - the most "Unix-like" Linux distribution.<br>
:small_orange_diamond: <a href="https://www.openbsd.org/"><b>OpenBSD</b></a> - multi-platform 4.4BSD-based UNIX-like operating system.<br>
:small_orange_diamond: <a href="https://hardenedbsd.org/"><b>HardenedBSD</b></a> - HardenedBSD aims to implement innovative exploit mitigation and security solutions.<br>
:small_orange_diamond: <a href="https://www.kali.org/"><b>Kali Linux</b></a> - Linux distribution used for Penetration Testing, Ethical Hacking and network security assessments.<br>
:small_orange_diamond: <a href="https://www.parrotsec.org/"><b>Parrot Security OS</b></a> - cyber security GNU/Linux environment.<br>
:small_orange_diamond: <a href="https://www.backbox.org/"><b>Backbox Linux</b></a> - penetration test and security assessment oriented Ubuntu-based Linux distribution.<br>
:small_orange_diamond: <a href="https://blackarch.org/"><b>BlackArch</b></a> - is an Arch Linux-based penetration testing distribution for penetration testers.<br>
:small_orange_diamond: <a href="https://www.pentoo.ch/"><b>Pentoo</b></a> - is a security-focused livecd based on Gentoo.<br>
:small_orange_diamond: <a href="https://securityonion.net/"><b>Security Onion</b></a> - Linux distro for intrusion detection, enterprise security monitoring, and log management.<br>
:small_orange_diamond: <a href="https://tails.boum.org/"><b>Tails</b></a> - is a live system that aims to preserve your privacy and anonymity.<br>
:small_orange_diamond: <a href="https://github.com/vedetta-com/vedetta"><b>vedetta</b></a> - OpenBSD router boilerplate.<br>
:small_orange_diamond: <a href="https://www.qubes-os.org"><b>Qubes OS</b></a> - is a security-oriented OS that uses Xen-based virtualization.<br>
</p>
##### :black_small_square: HTTP(s) Services
<p>
:small_orange_diamond: <a href="https://varnish-cache.org/"><b>Varnish Cache</b></a> - HTTP accelerator designed for content-heavy dynamic web sites.<br>
:small_orange_diamond: <a href="https://nginx.org/"><b>Nginx</b></a> - open source web and reverse proxy server that is similar to Apache, but very light weight.<br>
:small_orange_diamond: <a href="https://openresty.org/en/"><b>OpenResty</b></a> - is a dynamic web platform based on NGINX and LuaJIT.<br>
:small_orange_diamond: <a href="https://github.com/alibaba/tengine"><b>Tengine</b></a> - a distribution of Nginx with some advanced features.<br>
:small_orange_diamond: <a href="https://caddyserver.com/"><b>Caddy Server</b></a> - is an open source, HTTP/2-enabled web server with HTTPS by default.<br>
:small_orange_diamond: <a href="https://www.haproxy.org/"><b>HAProxy</b></a> - the reliable, high performance TCP/HTTP load balancer.<br>
</p>
##### :black_small_square: DNS Services
<p>
:small_orange_diamond: <a href="https://nlnetlabs.nl/projects/unbound/about/"><b>Unbound</b></a> - validating, recursive, and caching DNS resolver (with TLS).<br>
:small_orange_diamond: <a href="https://www.knot-resolver.cz/"><b>Knot Resolver</b></a> - caching full resolver implementation, including both a resolver library and a daemon.<br>
:small_orange_diamond: <a href="https://www.powerdns.com/"><b>PowerDNS</b></a> - is an open source authoritative DNS server, written in C++ and licensed under the GPL.<br>
</p>
##### :black_small_square: Other Services
<p>
:small_orange_diamond: <a href="https://github.com/z3APA3A/3proxy"><b>3proxy</b></a> - tiny free proxy server.<br>
</p>
##### :black_small_square: Security/hardening
<p>
:small_orange_diamond: <a href="https://twitter.com/EmeraldOnion"><b>Emerald Onion</b></a> - is a 501(c)(3) nonprofit organization and transit internet service provider (ISP).<br>
:small_orange_diamond: <a href="https://github.com/pi-hole/pi-hole"><b>pi-hole</b></a> - the Pi-hole® is a DNS sinkhole that protects your devices from unwanted content.<br>
:small_orange_diamond: <a href="https://github.com/stamparm/maltrail"><b>maltrail</b></a> - malicious traffic detection system.<br>
:small_orange_diamond: <a href="https://github.com/Netflix/security_monkey"><b>security_monkey</b></a> - monitors AWS, GCP, OpenStack, and GitHub orgs for assets and their changes over time.<br>
:small_orange_diamond: <a href="https://github.com/firecracker-microvm/firecracker"><b>firecracker</b></a> - secure and fast microVMs for serverless computing.<br>
:small_orange_diamond: <a href="https://github.com/StreisandEffect/streisand"><b>streisand</b></a> - sets up a new server running your choice of WireGuard, OpenSSH, OpenVPN, and more.<br>
</p>
#### Networks [<sup>[TOC]</sup>](#anger-table-of-contents)
##### :black_small_square: Tools
<p>
:small_orange_diamond: <a href="https://www.capanalysis.net/ca/"><b>CapAnalysis</b></a> - web visual tool to analyze large amounts of captured network traffic (PCAP analyzer).<br>
:small_orange_diamond: <a href="https://github.com/digitalocean/netbox"><b>netbox</b></a> - IP address management (IPAM) and data center infrastructure management (DCIM) tool.<br>
</p>
##### :black_small_square: Labs
<p>
:small_orange_diamond: <a href="https://labs.networkreliability.engineering/"><b>NRE Labs</b></a> - learn automation by doing it. Right now, right here, in your browser.<br>
</p>
##### :black_small_square: Other
<p>
:small_orange_diamond: <a href="https://ee.lbl.gov/"><b>LBNL's Network Research Group</b></a> - home page of the Network Research Group (NRG).<br>
</p>
#### Containers/Orchestration [<sup>[TOC]</sup>](#anger-table-of-contents)
##### :black_small_square: CLI Tools
<p>
:small_orange_diamond: <a href="https://github.com/google/gvisor"><b>gvisor</b></a> - container runtime sandbox.<br>
:small_orange_diamond: <a href="https://github.com/bcicen/ctop"><b>ctop</b></a> - top-like interface for container metrics.<br>
</p>
##### :black_small_square: Web Tools
<p>
:small_orange_diamond: <a href="https://github.com/moby/moby"><b>Moby</b></a> - a collaborative project for the container ecosystem to assemble container-based system.<br>
:small_orange_diamond: <a href="https://traefik.io/"><b>Traefik</b></a> - open source reverse proxy/load balancer provides easier integration with Docker and Let's encrypt.<br>
:small_orange_diamond: <a href="https://github.com/Kong/kong"><b>kong</b></a> - The Cloud-Native API Gateway.<br>
:small_orange_diamond: <a href="https://github.com/rancher/rancher"><b>rancher</b></a> - complete container management platform.<br>
:small_orange_diamond: <a href="https://github.com/portainer/portainer"><b>portainer</b></a> - making Docker management easy.<br>
:small_orange_diamond: <a href="https://github.com/jwilder/nginx-proxy"><b>nginx-proxy</b></a> - automated nginx proxy for Docker containers using docker-gen.<br>
</p>
##### :black_small_square: Security
<p>
:small_orange_diamond: <a href="https://github.com/docker/docker-bench-security"><b>docker-bench-security</b></a> - checks for dozens of common best-practices around deploying Docker.<br>
:small_orange_diamond: <a href="https://github.com/aquasecurity/trivy"><b>trivy</b></a> - vulnerability scanner for containers, suitable for CI.<br>
:small_orange_diamond: <a href="https://goharbor.io/"><b>Harbor</b></a> - cloud native registry project that stores, signs, and scans content.<br>
</p>
##### :black_small_square: Manuals/Tutorials/Best Practices
<p>
:small_orange_diamond: <a href="https://github.com/wsargent/docker-cheat-sheet"><b>docker-cheat-sheet</b></a> - a quick reference cheat sheet on Docker.<br>
:small_orange_diamond: <a href="https://github.com/veggiemonk/awesome-docker"><b>awesome-docker</b></a> - a curated list of Docker resources and projects.<br>
:small_orange_diamond: <a href="https://github.com/yeasy/docker_practice"><b>docker_practice</b></a> - learn and understand Docker technologies, with real DevOps practice!<br>
:small_orange_diamond: <a href="https://github.com/docker/labs"><b>labs
</b></a> - is a collection of tutorials for learning how to use Docker with various tools.<br>
:small_orange_diamond: <a href="https://github.com/jessfraz/dockerfiles"><b>dockerfiles</b></a> - various Dockerfiles I use on the desktop and on servers.<br>
:small_orange_diamond: <a href="https://github.com/kelseyhightower/kubernetes-the-hard-way"><b>kubernetes-the-hard-way</b></a> - bootstrap Kubernetes the hard way on Google Cloud Platform. No scripts.<br>
:small_orange_diamond: <a href="https://github.com/jamesward/kubernetes-the-easy-way"><b>kubernetes-the-easy-way</b></a> - bootstrap Kubernetes the easy way on Google Cloud Platform. No scripts.<br>
:small_orange_diamond: <a href="https://github.com/dennyzhang/cheatsheet-kubernetes-A4"><b>cheatsheet-kubernetes-A4</b></a> - Kubernetes CheatSheets in A4.<br>
:small_orange_diamond: <a href="https://github.com/kabachook/k8s-security"><b>k8s-security</b></a> - kubernetes security notes and best practices.<br>
:small_orange_diamond: <a href="https://learnk8s.io/production-best-practices/"><b>kubernetes-production-best-practices</b></a> - checklists with best-practices for production-ready Kubernetes.<br>
:small_orange_diamond: <a href="https://github.com/freach/kubernetes-security-best-practice"><b>kubernetes-production-best-practices</b></a> - kubernetes security - best practice guide.<br>
:small_orange_diamond: <a href="https://github.com/hjacobs/kubernetes-failure-stories"><b>kubernetes-failure-stories</b></a> - is a compilation of public failure/horror stories related to Kubernetes.<br>
</p>
#### Manuals/Howtos/Tutorials [<sup>[TOC]</sup>](#anger-table-of-contents)
##### :black_small_square: Shell/Command line
<p>
:small_orange_diamond: <a href="https://github.com/dylanaraps/pure-bash-bible"><b>pure-bash-bible</b></a> - is a collection of pure bash alternatives to external processes.<br>
:small_orange_diamond: <a href="https://github.com/dylanaraps/pure-sh-bible"><b>pure-sh-bible</b></a> - is a collection of pure POSIX sh alternatives to external processes.<br>
:small_orange_diamond: <a href="https://github.com/Idnan/bash-guide"><b>bash-guide</b></a> - is a guide to learn bash.<br>
:small_orange_diamond: <a href="https://github.com/denysdovhan/bash-handbook"><b>bash-handbook</b></a> - for those who wanna learn Bash.<br>
:small_orange_diamond: <a href="https://wiki.bash-hackers.org/start"><b>The Bash Hackers Wiki</b></a> - hold documentation of any kind about GNU Bash.<br>
:small_orange_diamond: <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/contents.html"><b>Shell & Utilities</b></a> - describes the commands offered to application programs by POSIX-conformant systems.<br>
:small_orange_diamond: <a href="https://github.com/jlevy/the-art-of-command-line"><b>the-art-of-command-line</b></a> - master the command line, in one page.<br>
:small_orange_diamond: <a href="https://google.github.io/styleguide/shellguide.html"><b>Shell Style Guide</b></a> - a shell style guide for Google-originated open-source projects.<br>
</p>
##### :black_small_square: Text Editors
<p>
:small_orange_diamond: <a href="https://vim.rtorr.com/"><b>Vim Cheat Sheet</b></a> - great multi language vim guide.<br>
</p>
##### :black_small_square: Python
<p>
:small_orange_diamond: <a href="https://awesome-python.com/"><b>Awesome Python</b></a> - a curated list of awesome Python frameworks, libraries, software and resources.<br>
:small_orange_diamond: <a href="https://github.com/gto76/python-cheatsheet"><b>python-cheatsheet</b></a> - comprehensive Python cheatsheet.<br>
:small_orange_diamond: <a href="https://www.pythoncheatsheet.org/"><b>pythoncheatsheet.org</b></a> - basic reference for beginner and advanced developers.<br>
</p>
##### :black_small_square: Sed & Awk & Other
<p>
:small_orange_diamond: <a href="https://posts.specterops.io/fawk-yeah-advanced-sed-and-awk-usage-parsing-for-pentesters-3-e5727e11a8ad?gi=c8f9506b26b6"><b>F’Awk Yeah!</b></a> - advanced sed and awk usage (Parsing for Pentesters 3).<br>
</p>
##### :black_small_square: \*nix & Network
<p>
:small_orange_diamond: <a href="https://www.cyberciti.biz/"><b>nixCraft</b></a> - linux and unix tutorials for new and seasoned sysadmin.<br>
:small_orange_diamond: <a href="https://www.tecmint.com/"><b>TecMint</b></a> - the ideal Linux blog for Sysadmins & Geeks.<br>
:small_orange_diamond: <a href="http://www.omnisecu.com/index.php"><b>Omnisecu</b></a> - free Networking, System Administration and Security tutorials.<br>
:small_orange_diamond: <a href="https://github.com/cirosantilli/linux-cheat"><b>linux-cheat</b></a> - Linux tutorials and cheatsheets. Minimal examples. Mostly user-land CLI utilities.<br>
:small_orange_diamond: <a href="https://github.com/snori74/linuxupskillchallenge"><b>linuxupskillchallenge</b></a> - learn the skills required to sysadmin.<br>
:small_orange_diamond: <a href="http://cb.vu/unixtoolbox.xhtml"><b>Unix Toolbox</b></a> - Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users.<br>
:small_orange_diamond: <a href="https://linux-kernel-labs.github.io/refs/heads/master/index.html"><b>Linux Kernel Teaching</b></a> - is a collection of lectures and labs Linux kernel topics.<br>
:small_orange_diamond: <a href="https://peteris.rocks/blog/htop/"><b>htop explained</b></a> - explanation of everything you can see in htop/top on Linux.<br>
:small_orange_diamond: <a href="https://linuxguideandhints.com/"><b>Linux Guide and Hints</b></a> - tutorials on system administration in Fedora and CentOS.<br>
:small_orange_diamond: <a href="https://github.com/NanXiao/strace-little-book"><b>strace-little-book</b></a> - a little book which introduces strace.<br>
:small_orange_diamond: <a href="https://github.com/goldshtn/linux-tracing-workshop"><b>linux-tracing-workshop</b></a> - examples and hands-on labs for Linux tracing tools workshops.<br>
:small_orange_diamond: <a href="https://github.com/bagder/http2-explained"><b>http2-explained</b></a> - a detailed document explaining and documenting HTTP/2.<br>
:small_orange_diamond: <a href="https://github.com/bagder/http3-explained"><b>http3-explained</b></a> - a document describing the HTTP/3 and QUIC protocols.<br>
:small_orange_diamond: <a href="https://www.manning.com/books/http2-in-action"><b>HTTP/2 in Action</b></a> - an excellent introduction to the new HTTP/2 standard.<br>
:small_orange_diamond: <a href="https://www.saminiir.com/lets-code-tcp-ip-stack-1-ethernet-arp/"><b>Let's code a TCP/IP stack</b></a> - great stuff to learn network and system programming at a deeper level.<br>
:small_orange_diamond: <a href="https://github.com/trimstray/nginx-admins-handbook"><b>Nginx Admin's Handbook</b></a> - how to improve NGINX performance, security and other important things.<br>
:small_orange_diamond: <a href="https://github.com/digitalocean/nginxconfig.io"><b>nginxconfig.io</b></a> - NGINX config generator on steroids.<br>
:small_orange_diamond: <a href="https://infosec.mozilla.org/guidelines/openssh"><b>openssh guideline</b></a> - is to help operational teams with the configuration of OpenSSH server and client.<br>
:small_orange_diamond: <a href="https://gravitational.com/blog/ssh-handshake-explained/"><b>SSH Handshake Explained</b></a> - is a relatively brief description of the SSH handshake.<br>
:small_orange_diamond: <a href="https://kb.isc.org/docs/using-this-knowledgebase"><b>ISC's Knowledgebase</b></a> - you'll find some general information about BIND 9, ISC DHCP, and Kea DHCP.<br>
:small_orange_diamond: <a href="https://packetlife.net/"><b>PacketLife.net</b></a> - a place to record notes while studying for Cisco's CCNP certification.<br>
</p>
##### :black_small_square: Microsoft
<p>
:small_orange_diamond: <a href="https://github.com/infosecn1nja/AD-Attack-Defense"><b>AD-Attack-Defense</b></a> - attack and defend active directory using modern post exploitation activity.<br>
</p>
##### :black_small_square: Large-scale systems
<p>
:small_orange_diamond: <a href="https://github.com/donnemartin/system-design-primer"><b>The System Design Primer</b></a> - learn how to design large-scale systems.<br>
:small_orange_diamond: <a href="https://github.com/binhnguyennus/awesome-scalability"><b>Awesome Scalability</b></a> - best practices in building High Scalability, High Availability, High Stability, and more.<br>
:small_orange_diamond: <a href="https://engineering.videoblocks.com/web-architecture-101-a3224e126947?gi=a896808d22a"><b>Web Architecture 101</b></a> - the basic architecture concepts.<br>
</p>
##### :black_small_square: System hardening
<p>
:small_orange_diamond: <a href="https://www.cisecurity.org/cis-benchmarks/"><b>CIS Benchmarks</b></a> - secure configuration settings for over 100 technologies, available as a free PDF.<br>
:small_orange_diamond: <a href="https://highon.coffee/blog/security-harden-centos-7/"><b>Security Harden CentOS 7</b></a> - this walks you through the steps required to security harden CentOS.<br>
:small_orange_diamond: <a href="https://www.lisenet.com/2017/centos-7-server-hardening-guide/"><b>CentOS 7 Server Hardening Guide</b></a> - great guide for hardening CentOS; familiar with OpenSCAP.<br>
:small_orange_diamond: <a href="https://github.com/decalage2/awesome-security-hardening"><b>awesome-security-hardening</b></a> - is a collection of security hardening guides, tools and other resources.<br>
:small_orange_diamond: <a href="https://github.com/trimstray/the-practical-linux-hardening-guide"><b>The Practical Linux Hardening Guide</b></a> - provides a high-level overview of hardening GNU/Linux systems.<br>
:small_orange_diamond: <a href="https://madaidans-insecurities.github.io/guides/linux-hardening.html"><b>Linux Hardening Guide</b></a> - how to harden Linux as much as possible for security and privacy.<br>
</p>
##### :black_small_square: Security & Privacy
<p>
:small_orange_diamond: <a href="https://www.hackingarticles.in/"><b>Hacking Articles</b></a> - LRaj Chandel's Security & Hacking Blog.<br>
:small_orange_diamond: <a href="https://github.com/toniblyx/my-arsenal-of-aws-security-tools"><b>AWS security tools</b></a> - make your AWS cloud environment more secure.<br>
:small_orange_diamond: <a href="https://inventory.rawsec.ml/index.html"><b>Rawsec's CyberSecurity Inventory</b></a> - an inventory of tools and resources about CyberSecurity.<br>
:small_orange_diamond: <a href="https://tls.ulfheim.net/"><b>The Illustrated TLS Connection</b></a> - every byte of a TLS connection explained and reproduced.<br>
:small_orange_diamond: <a href="https://github.com/ssllabs/research/wiki/SSL-and-TLS-Deployment-Best-Practices"><b>SSL Research</b></a> - SSL and TLS Deployment Best Practices by SSL Labs.<br>
:small_orange_diamond: <a href="http://selinuxgame.org/index.html"><b>SELinux Game</b></a> - learn SELinux by doing. Solve Puzzles, show skillz.<br>
:small_orange_diamond: <a href="https://smallstep.com/blog/everything-pki.html"><b>Certificates and PKI</b></a> - everything you should know about certificates and PKI but are too afraid to ask.<br>
:small_orange_diamond: <a href="https://appsecco.com/books/subdomain-enumeration/"><b>The Art of Subdomain Enumeration</b></a> - a reference for subdomain enumeration techniques.<br>
:small_orange_diamond: <a href="https://lifehacker.com/the-comprehensive-guide-to-quitting-google-1830001964"><b>Quitting Google</b></a> - the comprehensive guide to quitting Google.<br>
</p>
##### :black_small_square: Web Apps
<p>
:small_orange_diamond: <a href="https://www.owasp.org/index.php/Main_Page"><b>OWASP</b></a> - worldwide not-for-profit charitable organization focused on improving the security of software.<br>
:small_orange_diamond: <a href="https://www.owasp.org/index.php/Category:OWASP_Application_Security_Verification_Standard_Project"><b>OWASP ASVS 3.0.1</b></a> - OWASP Application Security Verification Standard Project.<br>
:small_orange_diamond: <a href="https://github.com/Santandersecurityresearch/asvs"><b>OWASP ASVS 3.0.1 Web App</b></a> - simple web app that helps developers understand the ASVS requirements.<br>
:small_orange_diamond: <a href="https://github.com/OWASP/ASVS/tree/master/4.0"><b>OWASP ASVS 4.0</b></a> - is a list of application security requirements or tests.<br>
:small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_Testing_Project"><b>OWASP Testing Guide v4</b></a> - includes a "best practice" penetration testing framework.<br>
:small_orange_diamond: <a href="https://github.com/OWASP/DevGuide"><b>OWASP Dev Guide</b></a> - this is the development version of the OWASP Developer Guide.<br>
:small_orange_diamond: <a href="https://github.com/OWASP/wstg"><b>OWASP WSTG</b></a> - is a comprehensive open source guide to testing the security of web apps.<br>
:small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_API_Security_Project"><b>OWASP API Security Project</b></a> - focuses specifically on the top ten vulnerabilities in API security.<br>
:small_orange_diamond: <a href="https://infosec.mozilla.org/guidelines/web_security.html"><b>Mozilla Web Security</b></a> - help operational teams with creating secure web applications.<br>
:small_orange_diamond: <a href="https://github.com/Netflix/security-bulletins"><b>security-bulletins</b></a> - security bulletins that relate to Netflix Open Source.<br>
:small_orange_diamond: <a href="https://github.com/shieldfy/API-Security-Checklist"><b>API-Security-Checklist</b></a> - security countermeasures when designing, testing, and releasing your API.<br>
:small_orange_diamond: <a href="https://enable-cors.org/index.html"><b>Enable CORS</b></a> - enable cross-origin resource sharing.<br>
:small_orange_diamond: <a href="https://appsecwiki.com/#/"><b>Application Security Wiki</b></a> - is an initiative to provide all application security related resources at one place.<br>
:small_orange_diamond: <a href="https://github.com/GrrrDog/weird_proxies/wiki"><b>Weird Proxies</b></a> - reverse proxy related attacks; it is a result of analysis of various proxies.<br>
:small_orange_diamond: <a href="https://dfir.it/blog/2015/08/12/webshell-every-time-the-same-purpose/"><b>Webshells</b></a> - great series about malicious payloads.<br>
:small_orange_diamond: <a href="https://portswigger.net/blog/practical-web-cache-poisoning"><b>Practical Web Cache Poisoning</b></a> - show you how to compromise websites by using esoteric web features.<br>
:small_orange_diamond: <a href="https://github.com/bl4de/research/tree/master/hidden_directories_leaks"><b>Hidden directories and files</b></a> - as a source of sensitive information about web application.<br>
:small_orange_diamond: <a href="https://bo0om.ru/en/"><b>Explosive blog</b></a> - great blog about cybersec and pentests.<br>
:small_orange_diamond: <a href="https://www.netsparker.com/security-cookies-whitepaper/"><b>Security Cookies</b></a> - this paper will take a close look at cookie security.<br>
:small_orange_diamond: <a href="https://github.com/GitGuardian/APISecurityBestPractices"><b>APISecurityBestPractices</b></a> - help you keep secrets (API keys, db credentials, certificates) out of source code.<br>
</p>
##### :black_small_square: All-in-one
<p>
:small_orange_diamond: <a href="https://lzone.de/cheat-sheet/"><b>LZone Cheat Sheets</b></a> - all cheat sheets.<br>
:small_orange_diamond: <a href="https://github.com/rstacruz/cheatsheets"><b>Dan’s Cheat Sheets’s</b></a> - massive cheat sheets documentation.<br>
:small_orange_diamond: <a href="https://devhints.io/"><b>Rico's cheatsheets</b></a> - this is a modest collection of cheatsheets.<br>
:small_orange_diamond: <a href="https://devdocs.io/"><b>DevDocs API</b></a> - combines multiple API documentations in a fast, organized, and searchable interface.<br>
:small_orange_diamond: <a href="https://cheat.sh/"><b>cheat.sh</b></a> - the only cheat sheet you need.<br>
:small_orange_diamond: <a href="https://gnulinux.guru/"><b>gnulinux.guru</b></a> - collection of cheat sheets about bash, vim and networking.<br>
</p>
##### :black_small_square: Ebooks
<p>
:small_orange_diamond: <a href="https://github.com/EbookFoundation/free-programming-books"><b>free-programming-books</b></a> - list of free learning resources in many languages.<br>
</p>
##### :black_small_square: Other
<p>
:small_orange_diamond: <a href="https://bitvijays.github.io/LFC-VulnerableMachines.html"><b>CTF Series : Vulnerable Machines</b></a> - the steps below could be followed to find vulnerabilities and exploits.<br>
:small_orange_diamond: <a href="https://github.com/manoelt/50M_CTF_Writeup"><b>50M_CTF_Writeup</b></a> - $50 million CTF from Hackerone - writeup.<br>
:small_orange_diamond: <a href="https://github.com/j00ru/ctf-tasks"><b>ctf-tasks</b></a> - an archive of low-level CTF challenges developed over the years.<br>
:small_orange_diamond: <a href="https://hshrzd.wordpress.com/how-to-start/"><b>How to start RE/malware analysis?</b></a> - collection of some hints and useful links for the beginners.<br>
:small_orange_diamond: <a href="http://www.kegel.com/c10k.html"><b>The C10K problem</b></a> - it's time for web servers to handle ten thousand clients simultaneously, don't you think?<br>
:small_orange_diamond: <a href="https://blog.benjojo.co.uk/post/why-is-ethernet-mtu-1500"><b>How 1500 bytes became the MTU of the internet</b></a> - great story about the Maximum Transmission Unit.<br>
:small_orange_diamond: <a href="http://poormansprofiler.org/"><b>poor man's profiler</b></a> - like dtrace's don't really provide methods to see what programs are blocking on.<br>
:small_orange_diamond: <a href="https://nickcraver.com/blog/2017/05/22/https-on-stack-overflow/"><b>HTTPS on Stack Overflow</b></a> - this is the story of a long journey regarding the implementation of SSL.<br>
:small_orange_diamond: <a href="https://drawings.jvns.ca/"><b>Julia's Drawings</b></a> - some drawings about programming and unix world, zines about systems & debugging tools.<br>
:small_orange_diamond: <a href="https://github.com/corkami/collisions"><b>Hash collisions</b></a> - this great repository is focused on hash collisions exploitation.<br>
:small_orange_diamond: <a href="https://github.com/in3rsha/sha256-animation"><b>sha256-animation</b></a> - animation of the SHA-256 hash function in your terminal.<br>
:small_orange_diamond: <a href="https://labs.ripe.net/Members/cteusche/bgp-meets-cat"><b>BGP Meets Cat</b></a> - after 3072 hours of manipulating BGP, Job Snijders has succeeded in drawing a Nyancat.<br>
:small_orange_diamond: <a href="https://github.com/benjojo/bgp-battleships"><b>bgp-battleships</b></a> - playing battleships over BGP.<br>
:small_orange_diamond: <a href="https://github.com/alex/what-happens-when"><b>What happens when...</b></a> - you type google.com into your browser and press enter?<br>
:small_orange_diamond: <a href="https://github.com/vasanthk/how-web-works"><b>how-web-works</b></a> - based on the 'What happens when...' repository.<br>
:small_orange_diamond: <a href="https://robertheaton.com/2018/11/28/https-in-the-real-world/"><b>HTTPS in the real world</b></a> - great tutorial explain how HTTPS works in the real world.<br>
:small_orange_diamond: <a href="https://about.gitlab.com/2018/11/14/how-we-spent-two-weeks-hunting-an-nfs-bug/"><b>Gitlab and NFS bug</b></a> - how we spent two weeks hunting an NFS bug in the Linux kernel.<br>
:small_orange_diamond: <a href="https://about.gitlab.com/2017/02/10/postmortem-of-database-outage-of-january-31/"><b>Gitlab melts down</b></a> - postmortem on the database outage of January 31 2017 with the lessons we learned.<br>
:small_orange_diamond: <a href="http://www.catb.org/esr/faqs/hacker-howto.html"><b>How To Become A Hacker</b></a> - if you want to be a hacker, keep reading.<br>
:small_orange_diamond: <a href="http://ithare.com/infographics-operation-costs-in-cpu-clock-cycles/"><b>Operation Costs in CPU</b></a> - should help to estimate costs of certain operations in CPU clocks.<br>
:small_orange_diamond: <a href="https://cstack.github.io/db_tutorial/"><b>Let's Build a Simple Database</b></a> - writing a sqlite clone from scratch in C.<br>
:small_orange_diamond: <a href="https://djhworld.github.io/post/2019/05/21/i-dont-know-how-cpus-work-so-i-simulated-one-in-code/"><b>simple-computer</b></a> - great resource to understand how computers work under the hood.<br>
:small_orange_diamond: <a href="https://www.troyhunt.com/working-with-154-million-records-on/"><b>The story of "Have I been pwned?"</b></a> - working with 154 million records on Azure Table Storage.<br>