This brief tutorial shows you how to install and enable Secure Shell (SSH) in Ubuntu 11.04 Natty Narwhal. As you may already know, SSH lets you communicate between two networked computers securely. Because SSH is more secure than Telnet, it is recommended that you use SSH instead of Telnet to communicate, and this tutorial will show you how to install and use it in Ubuntu 11.04

Getting started:

To get started, press Ctrl – Alt – T to open Terminal, then run the command below to install.

sudo apt-get install openssh-server

After installing, you may configure SSH Server by running the command below to open SSH config file.

gksu gedit /etc/ssh/sshd_config

Make all the changes in here and save the file. For instance, the default port SSH listens on is 22. Most SSH severs are set to communicate in Protocol Version 2. You could limit the IP Address SSH Server communicates on by uncommenting ( # ) line ListenAddress  x.x .x.x and specifying the IP Address.

Save the file when done. Try connecting from a remote computer. For Windows machines, download putty from here.

Type the Host Name or IP Address, and Port #, then click ‘Open’

When prompted with click ‘Yes’

Enjoy!