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Re:Awesome but commonly unknown Linux Commands by xtacy on Wednesday August 10, 2011 @11:19AM (#2868622)
On a mac, you could also use growlnotify.

    growlnotify -m "Hey I am done!" -t "Done!"
Re:Awesome but commonly unknown Linux Commands by LiveTheDream on Thursday August 11, 2011 @01:17AM (#2871511)
Also useful is the `-s` option to make the notification sticky

    growlnotify -s -t 'Done!' -m 'And I'm not going away until you click me'