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Q) 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.