In a previous post, we installed the Debian GNU/Linux operating system. Keeping systems secure and stable requires regular updates. Below is a quick cheatsheet with commands for Debian- and RHEL-based distributions.

## Debian / Ubuntu
# Update package index
sudo apt update

# List available updates
sudo apt list --upgradable

# Install updates
sudo apt upgrade -y


## RHEL / Rocky Linux / AlmaLinux
# Check for available updates
sudo dnf check-update

# Install all available updates
sudo dnf upgrade -y

Once the updates are complete, schedule a convenient time to reboot the server to apply kernel and core library changes.

sudo shutdown -r now