Free Quick Reference Cards in PDF format

[free quick reference cards for linux]

The Quick Reference Site - Free Quick Reference Cards in PDF format

The purpose of this site is to become the biggest resource for free Quick
Reference Cards on the net. It also has a section with free
e-books (all IT-related). They all are in PDF format and sorted by
category. Many of them are very usefull for both LINUX/UNIX and Windows users.

http://www.quickreferences.yucom.be/