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SU(1)			    General Commands Manual			 SU(1)

NAME
       su -- substitute	user identity

SYNOPSIS
       su  [-K	|  --no-kerberos]  [-f]	 [-l  |	 --full]  [-m]	[-i instance |
	  --instance=instance] [-c command | --command=command]	[login	[shell
	  arguments]]

DESCRIPTION
       su  will	 use Kerberos authentication provided that an instance for the
       user wanting to change  effective  UID  is  present  in	a  file	 named
       .k5login	in the target user id's	home directory

       A special case exists where `root's' ~/.k5login needs to	contain	an en-
       try  for: `user/<instance>@REALM' for su	to succed (where <instance> is
       `root' unless changed with -i).

       In the absence of either	an entry for current  user  in	said  file  or
       other  problems like missing `host/hostname@REALM' keys in the system's
       keytab, or user typing the wrong	password, su will fall back to	tradi-
       tional /etc/passwd authentication.

       When  using /etc/passwd authentication, su allows `root'	access only to
       members of the group `wheel', or	to any user  (with  knowledge  of  the
       `root' password)	if that	group does not exist, or has no	members.

       The options are as follows:

       -K, --no-kerberos don't use Kerberos.

       -f don't	read .cshrc.

       -l, --full simulate full	login.

       -m leave	environment unmodified.

       -i instance, --instance=instance	root instance to use.

       -c command, --command=command command to	execute.

HEIMDAL			       January 12, 2006				 SU(1)

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