SSH Server documentation

How to setup SSH server on Ubuntu

Check SSH service

sudo systemctl status ssh

Install SSH

sudo apt-get update sudo apt-get install openssh-server -y

Enable SSH

sudo systemctl enable ssh

Check or enable firewall

sudo ufw status sudo ufw enable

Add SSH to ufw firewall & reload

sudo ufw allow ssh sudo ufw reload

Add public key to authorized ssh keys

nano ./.ssh/authorized_keys - Paste public key, ctrl + x, ctrl + y & enter

Add directory & file permission

chmod 700 ~/.ssh chmod 600 ~/.ssh/authorized_keys

Edit the ssh configuration file

sudo nano /etc/ssh/sshd_config
Add the following lines: - ListenAddress 0.0.0.0 - AuthorizedKeysFile .ssh/authorized_keys - PubkeyAuthentication yes - PasswordAuthentication no