APT Basics

Update package list
sudo apt update

Upgrade packages
sudo apt upgrade

Full upgrade
sudo apt full-upgrade

Update & upgrade combined
sudo apt update && sudo apt upgrade -y

Install package
sudo apt install nginx

Install multiple
sudo apt install nginx mysql-server php

Remove package
sudo apt remove nginx

Remove with config files
sudo apt purge nginx

Remove unused dependencies
sudo apt autoremove

Search packages
apt search nginx

Show package info
apt show nginx

List installed packages
apt list --installed

List upgradable
apt list --upgradable

Clean package cache
sudo apt clean

Remove old packages
sudo apt autoclean

Check broken dependencies
sudo apt check

Fix broken installs
sudo apt --fix-broken install