$60K Jobs: The Unix Administrator by Perry Hurtt
Approx. 31,520 words.
Published on February 18, 2013.
By following the steps outlined in this book, you can achieve a very realistic $5K per month income ($60K annual) as a UNIX Administrator. This is only a starting point, of course - it's up to you to take it further but we believe $60K is a respectable and realistic target for many people.