su -> root shutdown

[BROWNH]

I find that when I've logged in to Linux as user and then su to become
root, that I don't have access to the shutdown command. An odd message
about bash not being able to see shutdown command.

I run bash both as root and user. When I log in as root, su to user, I
can shutdown after going back to root. But when I log in as user, I cannot
su to root to shut down.

??

Haines Brown