# 2.11BSD#431 - /usr/man/cat1/su.0

    SU(1)		    UNIX Programmer's Manual		    SU(1)

    NAME
         su - substitute user id temporarily

    SYNOPSIS
         su [ -f ] [ - ] [ 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)
         or csh(1) without changing the current directory.	The user
         environment is unchanged except for HOME and SHELL, which
         are taken from the password file for the user being substi-
         tuted (see environ(7)).  The new user ID stays in force
         until the Shell exits.

         If no userid is specified, ``root'' is assumed.  Only users
         in the ``wheel'' group (group 0) can su to ``root'', even
         with the root password.  To remind the super-user of his
         responsibilities, the Shell substitutes `#' for its usual
         prompt.

         The -f option prevents csh(1) from executing the .cshrc
         file; thus making su start up faster.

         The - option simulates a full login.

    SEE ALSO
         sh(1), csh(1)

    Printed 11/26/99	   May 5, 1986				1

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