Do I need to defrag and cleanup Linux like Microsoft
 

I tried searching the internet, but maybe I'm not familiar with the correct terms to use.
In Microsoft, it's almost essentail to defrag and wipe clean the hard drives etc.
Is this something that Linux doesn't need?
Can anyone point me to some information on the matter?

I use debian and see that there is a defrag deb but it does warn about not doing it on a mounted disk and it will wipe lilo (I think it was something like that), so it turned me away from doing it.

no, u dont have to defrag or do somethin similar with ur harddrive in gnu/linux, because the filesystems do not have such a fragmentation like windows have

Correct me if I'm wrong but I've heard that ext2 fragmentation is under 2%

for interested people
http://cbbrowne.com/info/defrag.html