SU(1)                                                                    SU(1)



NAME
       su - substitute user id temporarily

SYNOPSIS
       su [ -f ] [ - ] [ userid ]

DESCRIPTION
       _S_u  demands  the  password of the specified _u_s_e_r_i_d_, and if it is given,
       changes to that _u_s_e_r_i_d and invokes the Shell _s_h(1)  or  _c_s_h(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 substituted (see _e_n_v_i_r_o_n(7)).  The new user ID stays in
       force until the Shell exits.

       If no _u_s_e_r_i_d is specified, ‘‘root’’ is  assumed.   Only  users  in  the
       ‘‘wheel’’  group (group 0) can _s_u to ‘‘root’’, even with the root pass‐
       word.  To remind the super-user of his responsibilities, the Shell sub‐
       stitutes ‘#’ for its usual prompt.

       The -f option prevents _c_s_h(1) from executing the .cshrc file; thus mak‐
       ing _s_u start up faster.

       The - option simulates a full login.

SEE ALSO
       sh(1), csh(1)



3rd Berkeley Distribution         May 5, 1986                            SU(1)