A beginner’s guide to SSH for remote connection on Linux: 
One of Linux’s most appealing features is the ability to skillfully use a computer with nothing but commands entered into the keyboard—and better yet, to be able to do that on computers anywhere in the world. Thanks to OpenSSH, POSIX users can open a secure shell on any computer they have permission to access and use it from a remote location. It’s a daily task for many Linux users, but it can be confusing for someone who has yet to try it.
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