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How to install NMAP! Oh my god. You should check out
http://www.elearnsecurity.com/course/pe ... n_testing/
Sign up for the free module, I think its on sql injecting, It's quite good. I was tempted to give it a bash.
Yeah thats true, the OS courses aren't as expensive after the currency exchange, thought it'd be more lol. $ -> £ always confuses me.