http://developer.apple.com/documentation/OpenSource/Conceptual/ShellScripting/index.html

Introduction of 10 useful commend: objdump, file, od, xxd, strings, nm, time, ps, fuser, strace, ctags http://www.linuxjournal.com/article/7330

Install a Visual OS server at Linux , may be useful later - http://blog.codefront.net/2007/06/26/installing-xen-on-ubuntu-feisty-fawn-the-complete-newbies-guide/

Hello world of driver development - http://www.linuxdevcenter.com/lpt/a/7060

Commands cheat sheet - http://fosswire.com/wp-content/uploads/2007/08/fwunixref.pdf

Tutorial of build various servers - http://www.intac.net/build-your-own-server/ http://www.tuxradar.com/content/7-cool-linux-projects

# !!- run the previous command. 
# !ls - run the last command that started with ‘ls’.  
# !ls:p - This will display the command instead of running it.
# !$ - run the last word of the previous command. (for substitutions)
# !$:p - Instead of running the last word of the previous command this will print it out.
# !* run the previous command without the first word. (for substitutions)
# !*:p - print, again

http://codytaylor.org/2009/09/linux-bang-commands.html

Tutorial of system logging under unix - http://www.coolcoder.in/2013/12/common-linux-log-files-name-and-usage.html

http://www.opsschool.org/en/latest/