Uit:
http://www.gratisoft.us/sudo/troubleshooting.htmlQ) Sudo compiles but when I run it I get "Sorry, sudo must be setuid root."
and sudo quits.
A) Sudo must be setuid root to do its work. You need to do something like
`chmod 4111 /usr/local/bin/sudo'. Also, the file system sudo resides
on must *not* be mounted (or exported) with the nosuid option or sudo
will not be able to work. Another possibility is you may have '.' in
your $PATH before the directory containing sudo. If you are going
to have '.' in your path you should make sure it is at the end.