I don't think so; I enter Terminal commands with copy and paste.
>
Also you're making the infamous mistake of saying "it didn't work" without providing any real detail as to what happened when you tried.
Nothing happened; I hit "return" and wasn't even asked for my password...merely offered a new prompt.
I've got a coupl'a hunches, but I don't think I'll get a chance to investigate until tomorrow night. Hmmm...
You do come up with some doozies.
Having nothing happen —other than a new prompt —for that particular string is VERY strange.
We could maybe see part of your history?
grep du ~/.bash_history
EDIT: we may need this too, in case the session is still open:
history |grep du
