Basic Server Hardening: Secure Your Linux Server in 10 Minutes

Security is not optional — it’s your first layer of defense.

🔹 Update System

sudo apt update && sudo apt upgrade -y

🔹 Install Fail2Ban

sudo apt install fail2ban -y

🔹 Enable Firewall

sudo ufw allow OpenSSH
sudo ufw enable

🔹 Disable Root Login

/etc/ssh/sshd_config

Edit:

/etc/ssh/sshd_config

Set:

PermitRootLogin no

🔹 Restart SSH

sudo systemctl restart ssh

Always use SSH keys instead of passwords.