If you have a Linux Server (Cloud VPS / Dedicated Server / Cloud IaaS Instance) then administering it will require logging into a Terminal. The old, insecure way of accessing the server was by using Telnet. In the mid-1990's this was replaced with SSH which has now become a versatile, encrypted protocol capable of encrypting the login to a remote terminal and also encrypting file transfers. It is now a universal and standard way of connecting to Linux based Servers (and now even some Windows Servers).

The following documentation covers the use of SSH to log into a remote Linux Server from a local Windows or Linux computer and also explores using SSH to securely transfer files to a Linux server from a Windows or Linux computer.