I am new to LINUX!How do I cleanup junk TEMP files and Defrag.or do I have/or need to? THANKS

The ext2fs filesystem used by Linux doesn't suffer from the same fragmentation problems that the Windows and Mac filesystems do. If they did, an open-source defrag utiliy would be included with every distro. (Actually, I've heard that there are a couple of Linux defrag utilities out there, but as I recall they cause more problems than they cure) As far as cleaning out temp files goes- yes, that's a good idea, as is emptying your browser's cache and periodically pruning some of the contents of your /var/log directory. I can't really give you a definite answer as to *exactly* what you can delete, because it can depend on your particular installation, and I don't want to be responsible for giving you advice which hoses your system ;) In general, once you've found out what is safe to delete, you can add commands to your startup/shutdown scripts which will perform the deletions automatically.

The DEFRAG matter is answered above. Most defrag programs are for ext1filesystem. If you have a recent distribution you don't need to worry about temp files. Unless you tampered with default settings (cron/anacron) the /tmp directory is cleaned by tmpwatch and your log files are handled by logrotate. At least Redhat/Mandrake distr. Just empty the .netscape/cache directory once in a while.