Bash

• http://mywiki.wooledge.org/BashFAQ

Array

IFS=' ' read -a constant_array <<< "$constant"
constant_key=${constant_array[0]}
constant_value=${constant_array[1]}

File Exist

• http://stackoverflow.com/questions/6363441/check-if-a-file-exists-with-wildcard-in-shell-script

Find

Delete files older then 7 days

find /mnt/gfs/backup/content/ -name content\* -ctime +7 -exec rm -f {} \;

getopt

• http://www.bahmanm.com/blogs/command-line-options-how-to-parse-in-bash-using-getopt

Read lines from file

• http://en.kioskea.net/faq/1757-how-to-read-a-file-line-by-line
• http://www.cyberciti.biz/faq/unix-linux-bash-while-read-function-define-ifs-delimiter

Loop - For

• http://www.cyberciti.biz/faq/bash-loop-over-file/

Substring

• http://stackoverflow.com/questions/428109/extract-substring-in-bash