Wouldn't you love to automate tasks like configuring, configuration inventorying, provisioning and deprovisioning? After watching this Don Jones training you'll be automating lots of real-world tasks with Windows PowerShell commands.
Don's cookbook approach shows you exactly which commands to run... and then shows you how they work, so that you can customize them for your own needs.
While this training is not certification oriented, like all CBT Nuggets training, it gives you solid expertise in the topics it covers. Whatever you need to do in Windows Server 2008 R2 -- this will help you automate it!

Linux System Administration Recipes: A Problem-Solution Approach | 5 Mb

The job of Linux systems administrator is interrupt-driven and requires constant learning in byte-wise chunks. This book gives solutions to modern problems, even some you might not have heard of, such as scripting LDAP, making Mac clients play nice with Linux servers, and backup, security, and recovery scripts. Author Juliet Kemp takes a broad approach to scripting using Perl and bash, and all scripts work on Debian or Red Hat lineage distributions. Plus she dispenses wisdom about time management, dealing with desperate colleagues, and how to avoid reinventing the wheel!