What characters do I need to escape when using sed in a sh script? – Unix & Linux Stack Exchange http://unix.stackexchange.com/questions/32907/what-characters-do-i-need-to-escape-when-using-sed-in-a-sh-script
HowTo: Use grep Command In Linux / UNIX [ Examples ] http://www.cyberciti.biz/faq/howto-use-grep-command-in-linux-unix/