System Updates & Package Management

Keeping your server updated is the first line of defense.

# Debian/Ubuntu
sudo apt update && sudo apt upgrade -y
# RHEL/CentOS
sudo yum update -y
# Fedora
sudo dnf update -y

Enable automatic security updates:

sudo apt install unattended-upgrades
sudo dpkg-reconfigure --priority=low unattended-upgrades

Remove unnecessary packages:

sudo apt autoremove -y
sudo yum autoremove -y