SSH client

SSH, Telnet and Rlogin are three ways of doing the same thing: logging in to a multi-user computer from another computer, over a network.Multi-user operating systems, such as Unix and VMS, usually present a command-line interface to the user, much like the ‘Command Prompt’ or ‘MS-DOS Prompt’ in Windows. The system prints a prompt, and you type commands which the system will obey.


SSH, Telnet and Rlogin are network protocols that allow you to do this. On the computer you sit at, you run a client, which makes a network connection to the other computer (the server). The network connection carries your keystrokes and commands from the client to the server, and carries the server's responses back to you.

You might want to use SSH, Telnet or Rlogin if:

• you have an account on a Unix or VMS system which you want to be able to access from somewhere else
• your Internet Service Provider provides you with a login account on a web server. (This might also be known as a shell account. A shell is the program that runs on the server and interprets your commands for you.)
• you want to use a bulletin board system, talker or MUD which can be accessed using Telnet.

You probably do not want to use SSH, Telnet or Rlogin if:

• you only use Windows. Windows computers have their own ways of networking between themselves, and unless you are doing something fairly unusual, you will not need to use any of these remote login protocols.