SU(1)                                                       SU(1)

     NAME
          su  -  substitute user id temporarily

     SYNOPSIS
          su [ userid ]

     DESCRIPTION
          Su demands the password of the specified userid, and if it
          is given, changes to that userid and invokes the Shell sh(1)
          without changing the current directory or the user environ-
          ment (see environ(5)). The new user ID stays in force until
          the Shell exits.

          If no userid is specified, `root' is assumed.  To remind the
          super-user of his responsibilities, the Shell substitutes
          `#' for its usual prompt.

     SEE ALSO
          sh(1)