SSH is one of the most important tools for a Linux network administrator. It allows you to connect to servers and other workstations remotely, and work on them from within your favorite terminal emulator—all from the comfort of your desk. While SSH might not be the perfect tool for every situation, it's one of those that you won't be able to imagine life without, once you start using it.
In this chapter, we explore SSH and cover the following topics:
Using OpenSSH
Installing and configuring OpenSSH
Connecting to network hosts via openssh-client
The OpenSSH config file
Understanding and utilizing
scp
Transferring files to another node via
scp
Tunneling traffic via SSH
Generating public keys
Keeping SSH connections alive
Exploring an alternative to SSH – utilizing Mosh (mobile shell)