nothing new. just to remember some commands on OS X

Modify PATH

#to set the variable PATH to the value /bin:/sbin:/user/bin:/user/sbin:/system/Library/, you would enter the following command in a Terminal window:
$ PATH=/bin:/sbin:/user/bin:/user/sbin:/system/Library/ export PATH
#This modifies the environment variable PATH with the value assigned. 

#To view all environment variables, enter:
$ env

New PATH

# Prioritize local folder instead of system folder
$ PATH=/bin:/sbin:usr/local:usr/local/bin:/user/bin:/user/sbin:/system/Library/ export PATH