Cheswick, William R. (2003). Firewalls and Internet security : repelling the Wily Hacker / William R. Cheswick, Steven M. Bellovin, Aviel D. Rubin. Boston: Addison-Wesley Publishing Company, cop. 2003
ISBN: 020163466X

Ward, Brian (2004). How Linux works : what every superuser should know / by Brian Ward. San Francisco : No Starch Press, cop. 2004
ISBN: 1593270356

Nemeth, Evi (2007). Linux administration handbook / Evi Nemeth, Garth Snyder, Trent R. Hein with Lynda McGinley: Upper Saddle River : Prentice Hall PTR, cop. 2007
ISBN: 0131480049

Hudson, Andrew (2006). Red Hat Fedora Core 6 unleashed / Andrew Hudson, Paul Hudson. Indianapolis : Sams, 2006
ISBN: 0672329298

Limoncelli, Tom (2007). The practice of system and network administration / Thomas A. Limoncelli, Christine J. Hogan, Strata R. Chalup. Upper Saddle River : Addison-Wesley, cop. 2007
ISBN: 9780321492661