What is sudo command for? can I undo sudo commands?

what is sudo command for? can I undo sudo commands?

Niel wrote:
If a dialog box appears that asks for your password, ask yourself whether you're doing anything that requires it, such as logging in, using sudo, moving or copying items in some system-level folders, or installing software. Mistyping a command may delete files that should remain intact, or damaging the Mac OS X installation by moving files around or altering permissions on certain components.
(30169)
Is there any way that I could know that those problems are occuring>>> i'm referring to "moving files" and altering permissions on certain components?
and when you say altering permissions? what do you mean by that?
is there anyway that I can fix it? or buy a certain software for mac that would fix the system problems? like in windows there are Norton system work
I was wondering I copy and paste the said command to my terminal but it didn't work. Do you know what would happen to my system if I messed up with that command? >>>im referring to this command http://docs.info.apple.com/article.html?artnum=307354
Message was edited by: Mac Ken

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