apt update
apt install package name
apt install -y package name

apt upgrade
apt full-upgrade
apt dist-upgrade


apt remove package name
apt purge package name
apt autoremove

apt -o Acquire::ForceIPv4=true update

Debian 11 → 13

1. Upgrade to Debian 12
2. Upgrade to Debian 13

sudo apt install -y screen && screen
sudo sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list                              # Debian 11 -> Debian 12
sudo find /etc/apt/sources.list.d -type f -exec sed -i 's/bullseye/bookworm/g' {} \;   # Debian 11 -> Debian 12
sudo sed -i 's/bookworm/trixie/g' /etc/apt/sources.list                                # Debian 12 -> Debian 13
sudo find /etc/apt/sources.list.d -type f -exec sed -i 's/bookworm/trixie/g' {} \;     # Debian 12 -> Debian 13
sudo apt update && sudo apt full-upgrade
sudo systemctl reboot
sudo apt autoremove && sudo apt clean
sudo systemctl --failed