Hello Linux Geeksters. As you may know SSH (Secure Shell) is a protocol that enables the users to easily access other systems remote, from either the command-line or graphical user interaface.
In this article I will show you how to install and enable SSH on Ubuntu 14.10 Utopic Unicorn and derivative systems.
By default, SSH is not installed and enabled on Ubuntu 14.10, so the users have to install the opessh-client and opessh-server packages:
$ sudo apt-get install openssh-client openssh-server
And restart the SSH server:
$ sudo /etc/init.d/ssh restart
After you have properly installed SSH, you can access another system via the command ssh username@hostname where username should be replaced by your user and hostname by the server’s IP.
By default, SSH “works” on port 22, if you want to use a different port, use the ssh username@hostname -p port_number, and replace port_number with the desired port.
Also worth mentioning, if you want to modify the SSH behavior, edit the /etc/ssh/sshd_config.