How to Add a New Path to PATH at Command Line the Right Way
The user path is the series of directories that command line programs are searched in order to run. For example, if you type ‘iostat’ into the terminal, then iostat will be run from /usr/sbin because “/usr/sbin” is part of your $PATH. Accordingly, users who frequently use the command line may need to adjust or add new paths to their terminal so that commands can execute properly.