4.
Bibliografia sobre Linux e Unix
Um nível acima
The Complete FreeBSD, Greg Lehey. Fourth Edition - O'Reilly.
Absolute OpenBSD: Unix for the pratical paranoid, Michael W. Lucas. 2003, No Starch Press.
Manual Completo do Linux, Evi Nemeth, Garth Snyder, Trent R. Hein. 2004, Makron Books.
