I'm a seasoned Unix/Linux admin with more than 20 years of experience, i've started with slackware linux in 1996, and passed through Unisys, SCO, Solaris, RedHat, Mandrake, Centos, Solaris and AIX.(also been a winadmin but a little embarrased to said so). I'm a certified AIX Specialist, and a Redbook Author.