USC CRCISI
Novell - OpenCourseWare Project (novell.com)
VTC University (vtc.com)
IBM - Linux Professional Institute (LPI) Exam Prep (ibm.com)
University of Surrey - Department of Electronic Engineering (www.ee.surrey.ac.uk)
University of California at Davis - Professor Norm Matloff’s Unix and Linux Tutorial Center (ucdavis.edu)
Shuttleworth Foundation - Learn Linux Open Source Project (learnlinux.tsf.org)
Linux Online (linux.org)
Begin Linux (beginlinux.org)
About.com Linux Courses (linux.about.com)
The Linux Tutorial (linux-tutorial.info)
broadband expert Ultimate Linux Guide (boradbandexpert.com)