Hi,

If you use
su
only, you assume root privileges without the root environment.
Rather do
su -
which gives you the full root environment, including path.
The same holds for other users, i..e
su - joe
switches the user to the user joe with full environment.

Thanks a million for that! Going to save me a ton of time from issuing whereis command to find commands when I need to follow instructions off a website!