A notification center notification would be ideal but growl, bounce dock, sound, etc would be fine, too (or if this can only be done in Terminal.app I\'d be willing to switc
You can add any one of the following after any command, with a semi-colon in between the command and it:
afplay /System/Library/Sounds/Ping.aiff -v 2
osascript -e 'beep 3'
tput bel
or, if you like Notification Centre
osascript -e 'display notification "Lorem ipsum dolor sit amet" with title "Title"'
You can also make an alias in your profile, called notify and add that at the end of your command. So, in your login profile
alias notify="tput bel"
then
sleep 10; notify
Or, if you started your command and it is "hanging", just type notify and hit Enter and it will run your notify alias at the end, whne the command has finished, e.g.
sleep 20
# wait 5 seconds before realising this will take 20 seconds
notify