Mac OS X in a Nutshell

Remote Logins

Through the Terminal application, you can log into other (usually Unix or Mac OS X) machines over a network and run command-line programs on them through a shell, just as Terminal lets you normally do with your own machine.

Programs you can use for this include telnet and ssh. You can find references to both in Chapter 25, but the general way to run them is to simply use telnet (or ssh) -l username host. If host accepts the connection, you’ll be prompted for a password. Once authenticated, the remote machine will greet you with a shell prompt of its own. For example, the following example is the user jmac using ssh to connect from his local machine (named endif) into another Mac OS X machine on his local network (named borg):

[jmac@endif /Users/jmac]% ssh borg
jmac@borg's password: *****
Last login: Sat Jun 29 23:00:58 2002 from 192.168.0.251
Welcome to Darwin!
[borg:~] jmac%

Note the different prompts, due to different shell configurations this user has on the two machines. Note also that configuring one’s shell to display the current hostname within one’s prompt can be a good idea, since it acts as a constant reminder of which machine you’re working with!

If your username on the remote machine is not the same as the one you use locally, use the ssh command’s ssh username@host or ssh -l host syntax.

Tip

If you have X Windows installed on your Mac, you can run other Unix machines’ GUI software on your machine, as described in Chapter 23. You can also use VNC to log ...