/etc/profile
to edit this file
nano /etc/profile
I wanted to add a shortcut for Zend Framework tools. I append this to the end of file
alias zf=/Applications/MAMP/bin/php/php5.4.4/bin/zf.sh
Then CTRL + o to Save
CTROL + x to exit
Edit:
Turns out that the file located at /etc/profile is the global config for BASH, you can use .profile under the user directory.