bash prompt

CO_G='\[\033[0;32m\]'
CO_RST='\[\033[0m\]'

PS1="\u@$CO_G\h$CO_RST:\w\$ '

참고
http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/x329.html
http://unix.stackexchange.com/questions/148/colorizing-your-terminal-and-shell-environment