SSH is protocol to log onto remote system and executing command onto remote system. It is mainly used to access Linux and Unix system. To connect to remote system in ubuntu we uses SSH command. SSH stand for secure shell which allow to access remote system in secure way.
ssh <username>@<domain name or IP address of remote system>
In Ubuntu SSH can be directly used on terminal. In windows we need one extra program to run. This can be putty. Putty allow a window user to to connect remote Linux machine.
That’s all in this post. Hope this is helpful for you.