Here's another list of the best hacking sites and downloadable projects available on the web where you can legally practice your hacking skills.
linux admin quick reference #linux
Basic #Linux Commands Cheat Sheet
Should You Learn Python, C, or Ruby to Be a Top Coder? (Infographic) | Inc.com
Learn Basic Linux Commands with This Downloadable Cheat Sheet
Windows apps vs Linux alternatives | #Linux #Software Mais
Linux Directory Structure (File System Structure) Explained with Examples
Linux - The One Page Linux Manual
Mobile UX Checklist [Infographics] -- [Mobile Development] [Mobile Design] [App Design] [UX] #DigitalE45DK #BizzAppsDK #HyperSynectics
Maybe i'll print this out for people who don't know what they want their layouts to be for site design...