I started using Linux recently and I fell in love with it. I am learning a lot of stuff but I have a lot of questions. 1) I am also trying to learn system programming. Where I can find the source codes for the command line tools like ls, cp, mv, mount and other hundreds of commands. I have Suse 8.1 on my laptop. I could only find the kernel source code, which I am not interested in right now. Does the Suse CDS have it? 2) Another nagging question is, where do I install a new software? /usr/local, /opt or home dir? Until now, I have intalled all the software in my home dir. How do I make them available to other users? Who do I install them as, "root" or a "reqular user"? Do I have to differentiate between system software and application software? for eg: a new browser for every user; a build tool like "ant" just for me. 3) How do I keep track of the software I installed? I mean, some applications are tar balls, others are rpms (binary and source). "rpm" system has a database of its own. What about the tarballs? What if I Install an rpm of an application and try to install the same application again using a tarball? eg: I installed a new orinoco wireless driver, packaged as a tarball. I had to toil, to install it in the right place, to bakup the old module, to document what I have done etc. Too many questions, I guess. I actually have a lot more! (mapping special keys, micro-phone not working, audio-cds cannot be ripped ....) I appreciate your help. Thanks Jay __________________________________ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com