Matthieu's Dotfiles

This project serves me to install, configure and maintain my development workflow on macOS / Ubuntu / Arch. Like that, I can easily reset a Mac or Linux machine and start fresh without installing manually !

I'm back to Arch Linux !

A fresh macOS / Ubuntu / Arch

Before begin to re-install your machine, please check this steps :

• Did you commit and push on all your repositories ?
• Did you save all your documents not present in Cloud.

You can now install a clean macOS or Ubuntu.

Usage

You can now clone this repository :

git clone git@github.com:matthieumota/dotfiles.git .dotfiles
cd .dotfiles
# On your Mac
./setup-mac.sh
# On your Ubuntu
./setup-ubuntu.sh
# On your Arch
./setup-arch.sh

Tunnel SSH

Sometimes, I need to create SSH tunnel. For instance, to create a tunnel on 3002 port on 1.2.3.4 server for domain:80 :

ssh -R 3002:domain:80 -N cloud@1.2.3.4

After, we can use a nginx reverse proxy with :

location / {
    proxy_pass http://localhost:3002;
    proxy_set_header Host domain;
}

We can also make a simple tunnel to remote server :

ssh -L 3307:localhost:3306 -N cloud@1.2.3.4

Docker

To manage old PHP versions, I have 2 choices :

• Simply install old versions on machine with AUR or PPA.
• Use docker to manage old PHP versions containers, you can find configuration in docker folder.

You can use PHP FPM on Nginx (or Apache but no documented) :

location ~ \.php$ {
    # 9082 is exposed for PHP 8.2
    # 9081 is exposed for PHP 8.1
    fastcgi_pass 127.0.0.1:9081;
}

You can run PHP commands via container :

docker compose exec php81 php --version
docker compose exec php81 composer

Be careful to adapt Dockerfile and compose.yaml with your information (Project path, name, user id and group id from system) and you can build images

docker compose up -d --build

You can easily add other PHP versions.

QEMU

We use QEMU for Virtualization. To create a disk :

qemu-img create -f qcow2 test 10G

Create a NAT for network :

# Create tap and NAT on host
sudo ip tuntap add tap0 mode tap
sudo ip addr add 192.168.100.1/24 dev tap0
sudo ip link set tap0 up
sudo iptables -t nat -A POSTROUTING -o wlp13s0 -s 192.168.100.1/24 -j MASQUERADE
sudo iptables -I DOCKER-USER 1 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
sudo iptables -I DOCKER-USER 2 -i tap0 -o wlp13s0 -j ACCEPT

# On the guest without DHCP
sudo ip a add 192.168.100.2/24 dev ens3
sudo ip route add default via 192.168.100.1

We can enable DHCP on host in /etc/NetworkManager/dnsmasq.d/local :

address=/bx/127.0.0.1

interface=tap0
bind-interfaces
dhcp-range=192.168.100.2,192.168.100.254

Boot with an iso on a disk :

qemu-system-x86_64 -cdrom ~/Téléchargements/archlinux-2024.08.01-x86_64.iso \
    -boot order=d \
    -drive file=test,format=qcow2 \
    -cpu host -smp 2 -m 2G \
    -netdev tap,id=net0,ifname=tap0,script=no,downscript=no \
    -device virtio-net,netdev=net0 \
    -enable-kvm

We can also mount a partition from qcow2 image :

sudo modprobe nbd
sudo qemu-nbd -c /dev/nbd0 test
sudo qemu-nbd -d /dev/nbd0

Run guest after installation :

qemu-system-x86_64 -drive file=test,format=qcow2 \
    -cpu host -smp 2 -m 2G \
    -netdev tap,id=net0,ifname=tap0,script=no,downscript=no \
    -device virtio-net,netdev=net0 \
    -enable-kvm