See:
Look, we're going to be up front about this: there aren't any movies made about network administrators. None. Think about it—what would the trailer narration be?

Fade in: A dark office building at night with a single office light on. Deep, dramatic voiceover begins: "In a world where anti-virus patches must be installed over the weekend; where outdated passwords stop business dead in its tracks; and where software updates only come at inconvenient times, there's only one woman they can count on: she's Harriet, the Network Administrator."

Can't you just see them lining up outside the theater for that one? We can't either.

Read:
The Linux Command Line: A Complete Introduction 
Official (ISC)2 Guide to the CISSP CBK, Fourth Edition 
Nmap Network Scanning: The Official Nmap Project Guide to Network Discovery and Security Scanning 
Command Line Kung Fu: Bash Scripting Tricks, Linux Shell Programming Tips, and Bash One-liners 

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