Well I'll asked because I don't know how the linux system is build like and I have been unlucky with my google search (or searched on wrong words).
Not that I'm saying when people here says it's not needed for defrag and clean up, just when you got used to winblow in so many years you think all these tools is a must. That's why so many people ask the question....I think (I can only speak for myself :) )
Would you post a link which give a deep explaination, thanks :)
.:=The AI Dude=:.