Nisha,

The details for configuring these services tend to be specific to the flavor of UNIX, and the service software itself. What flavor of UNIX are you working with?

The best methodology that I have found for learning different aspects of UNIX system administration is hands-on experience. This may initially sound like a lame answer, but it is what has worked for me. Just reading about something will only take you so far. You really start to learn when you put what you have read into practice. If available, test (non-production) systems are the best place to try things out before working on the production boxes.

Here's a few links that may help:
http://pluto.phys.nwu.edu/~zhaoyj/le...system/toc.htm
http://www.washington.edu/R870/R870.html
http://www.astro.uni-frankfurt.de/~R...sysadmin.shtml

Good luck!

Biker
Systems/Network Administrator
LiveFire Labs - Hands-On Technical e-Learning
www.LiveFireLabs.com