I discovered this this morning. I'm working on a tomcat application and I have to stop the server, deploy some theme changes with a script then start the server up again (I know, it's a dumb setup but I didn't write the app, I'm only using it ;-) So I'd type "stopcp" to stop the server, then the deploy skin script, then I'd type in "startcp". But (and this may have been obvious to everyone but me) if I put a semi-colon between the commands, I can have all three run one after the other automatically.
Example:
stopcp; deployskintemplate -t classic; startcp
Saves me from having to do three things. I can just sit back and watch it go. Hopefully you find this useful!
