Update apt's package list from the repository sudo apt-get update

Install openssh-server package. sudo apt-get install -y openssh-server

ssh service should be started and enabled by default after installation. Check to confirm. sudo systemctl status ssh

Start the ssh service if it's not already started. sudo systemctl start ssh

You can disable ssh from running by default during system boot. sudo systemctl disable ssh

To enable it back again, run the following command. sudo systemctl enable ssh

Configure SSH server options by editing the configuration file using your favorite editor. sudo nano /etc/ssh/sshd_config

SSH service will need to be restarted or reloaded for the changes to take effect. sudo systemctl restart ssh