Added Servers for Hackers

At some point, every programmer finds themselves needing to know their way around a server.

Servers for Hackers is a newsletter for those times.

README.md

@@ -353,6 +353,7 @@ Various resources, such as books, websites and articles, for improving your skil
 
 * [Ops School](http://www.opsschool.org) - Comprehensive program that will help you learn to be an operations engineer.
 * [Dotdeb](http://www.dotdeb.org/) - Repository with LAMP updated packages.
+* [Servers for Hackers](http://serversforhackers.com/) - Newsletter for programmers who find themselves needing to know their way around a server.
 
 # Contributing
 Please see [CONTRIBUTING](https://github.com/kahun/awesome-sysadmin/blob/master/CONTRIBUTING.md) for details.