Python

Create a virtual environment with venv

python3 -m venv <MYVENV>
source MYENV/bin/activate

Generate requirements file

pip freeze > requirements.txt

Install project dependencies

pip install -r requirements.txt

FastAPI

Run in development mode

fastapi dev main.py

Run in production mode

fastapi run main.py

Flask

Run app_name

flask --app app_name run --debug

Django

Create a project

django-admin startproject mysite

Create an app

python manage.py startapp myapp

Run server

python manage.py runserver

Run tests

python manage.py test

Make empty migration with chosen name

python manage.py makemigrations --empty APP --name NAME

Celery

Run worker

celery -A project_name worker -l info

Run celery beat (periodic tasks)

celery -A project_name beat

Vue

Create project (add . at the end to create in current dir)

vue create hello-world

Run project

npm run serve

React

Create project

npx create-react-app my-app

Run project

npm start

Deploy to Github Pages

npm run deploy

More about GH Pages

Heroku

Login

heroku login

Reset database

heroku pg:reset DATABASE

Run Django migrations

heroku run python manage.py migrate

PostgreSQL

List databases

\l

Connect to database

\c NAME

List tables

\dt

Linux

Set env var permamently

sudo vim /etc/environment
VAR="SOMETHING"

Set alias in ~/.bashrc

alias python='python3'
alias pip='pip3'

Kill processes associated with port 8000

sudo fuser -k 8000/tcp

Git

Set username and password

git config --global user.name "John Doe"
git config --global user.email johndoe@example.com