http://www-128.ibm.com/developerworks/offers/lp/linux/bb/ http://www-128.ibm.com/developerworks/linux/lpi/index.html http://oreilly.useractive.com/courses/sysadmin.php3 (must pay for these courses - through University of Illinois to get your Unix/Linux system administrator certificate). http://www.lpi.org/en/testprep.html