^Chuck Easttom (2012). Essential Linux Administration: A Comprehensive Guide For Beginners, Course Technology PTR. Indigo. ISBN 9781435459564 (revised Dec 2023)
^Easttom, Chuck (2014). Essential Linux Administration : A Comprehensive Guide for Beginners, Cengage Learning PTR. BiggerBooks. ISBN 9781435459564 (revised Nov 2023)
^ (2013). Essential Linux Administration : A Comprehensive Guide for BeginnersECampus. ISBN 9781435459564 (revised Apr 2015)