Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
While as a Sysadmin our world is generally speaking goverend by Windows Desktops and servers, Microsoft's OS isn't the best one out there at every task, for some tasks Linux is the answer, I've written on other blogs on a similar topic, about Linux Distros and which ones you will get he most out of. The idea behind most of these Linux Distros is they act as a tool or a set of tools to perform a certain task.
Each one of thses distros is free, downloads as an ISO and can be run (apart from one) booted from a CD without installation.