Secure Shell (SSH) is a feature of Linux that allows you to effectively open a terminal session on your Raspberry Pi from the command line of your host computer.
Recent versions of Rasbpian enable SSH access by default. On older installations, you can use Raspi Config, which you first saw back in Lesson 2.
In order to do this, open LX Terminal on your Pi and enter the following command to start Raspi Config:
Scroll down to the “ssh” option.
Hit the Enter and then select “Enable”
A script will run and then you will see the following as confirmation: