Package Management

On Linux you install software through a package manager, not by downloading installers. It handles dependencies, updates, and clean removal from trusted repositories.

#The major families

sudo apt update           # refresh the package index
sudo apt upgrade          # update installed packages
sudo apt install nginx
apt list --installed

#Keep it patched (security!)

# automatic security updates
sudo apt install unattended-upgrades

Unpatched packages are a top breach vector — automate security updates (Linux Server Hardening Baseline).

#Universal formats

Prefer your distro's repos (signed, integrated) and add third-party sources sparingly — each one is trust you're extending.

Related: Linux Server Hardening Baseline · Docker Compose for Self-Hosting · Understanding systemd