SSH, or Secure Shell, is a network protocol used to connect to a web server and perform different tasks through a command line. The protocol is used by many experienced users, due to the fact that the information transmitted over it is encrypted, so it cannot be intercepted on the way by a third party. SSH access may be used for a lot of things with regards to the type of website hosting account. With a shared hosting account, in particular, SSH is among the ways to import/export a database or to upload a file in case the server allows for it. If you have a virtual or a dedicated server, SSH may be used for virtually anything - you can install software or restart particular services such as the web server or the database server which run on the machine. SSH is employed primarily with UNIX-like Platforms, but there are clients which allow you to use the protocol if your computer is using a different Operating System as well. The connection is established on TCP port 22 by default and the remote web server always listens for incoming connections on that port though many service providers change it for security reasons.