JayTheCracker wrote: » websitesProgramming and Penetration Testing » Complete Linux Tutorial Part 1rhce.cobooks Linux+ Complete Study Guide - by Roderick W. Smith [Sybex] Ubuntu Certified Professional Study Guide - by Micheal Jang [McGraw Hill]RHCSA/RHCE Red Hat Linux Certification Study Guide - by Micheal Jang [McGraw Hill] Hands on guide to Red Hat exams:RHCSA & RHCE Cert Guide & Lab Manual - by Damian [Pearson]