Linux/Unix Cheat Sheets part-1

Are you new/intermediate to Linux and want to use the command based shell(terminal) for most of your work. So no worries, below are the best sites i find out.
Hope every body will find it useful.

1- Unix Toolbox
2- UNIX Tutorial for Beginners
3- Learning the shell
4- Learn Unix in 10 minutes

I will carry on my research, and will post more links as i got.

Regards
ANL