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CHPASS(1)										CHPASS(1)

       chpass - add or change user database information

       chpass [ -a list ] [ user ]

       Chpass  allows  editing	of  the  user  database  information  associated with user or, by
       default, the current user.  The information is formatted and supplied  to  an  editor  for
       changes.   The  vi editor will be used unless the environmental variable EDITOR selects an
       alternate editor.  When the editor terminates, the information  is  re-read  and  used  to
       update  the user database itself.  Only the user, or the super-user, may edit the informa-
       tion associated with the user.

       Only the information that the user is allowed to change is displayed.

       Possible display items are as follows:

	       Login:		  user's login name
	       Password:	  user's encrypted password
	       Uid:		  user's id
	       Gid:		  user's login group id
	       Change:		  password change time
	       Expire:		  account expiration time
	       Class:		  user's general classification
	       Home Directory:	  user's home directory
	       Shell:		  user's login shell
	       Full Name:	  user's real name
	       Location:	  user's normal location
	       Home Phone:	  user's home phone
	       Office Phone:	  user's office phone

       The login field is the user name used to access the computer account.

       The password field contains the encrypted form of the user's password.

       The uid field is the number associated with the login field.  Both of these fields  should
       be  unique  across  the	system (and often across a group of systems) as they control file

       While it is possible to have multiple entries with identical login names and/or	identical
       user  id's,  it	is usually a mistake to do so.	Routines that manipulate these files will
       often return only one of the multiple entries, and that one by random selection.

       The group field is the group that the user will be placed in upon login.  Since this  sys-
       tem supports multiple groups (see groups(1)) this field currently has little special mean-
       ing.  This field may be filled in with either a number or a group name (see group(5)).

       The change field is the date by which the password must be changed.

       The expire field is the date on which the account expires.

       Both the change and expire fields should be entered in the form ``month day  year''  where
       month is the month name (the first three characters are sufficient), day is the day of the
       month, and year is the year.

       The class field is currently unused.  In the near future it will be a key to a  termcap(5)
       style database of user attributes.

       The  user's  home  directory  is  the full UNIX path name where the user will be placed on

       The shell field is the command interpreter the user prefers.  If the shell field is empty,
       the Bourne shell (/bin/sh) is assumed.

       When  altering  a  login  shell,  and not the super-user, the user must select an approved
       shell from the list in /etc/shells.

       The last four fields are for storing the user's full name, office location, and	home  and
       work telephone numbers.

       The  super-user	is  also  allowed to directly supply a user database entry, in the format
       specified by passwd(5), as an argument to the -a option.  This argument must  be  a  colon
       (``:'') separated list of all the user database fields, although they may be empty.

       Once  the  information has been verified, chpass uses mkpasswd(8) to update the user data-
       base.  This is run in the background, and, at very large sites could take several minutes.
       Until this update is completed, the password file is unavailable for other updates and the
       new information will not be available to programs.

       /etc/master.passwd	The user database /etc/shells		   The list  of  approved

       login(1), finger(1), getusershell(3), passwd(5), mkpasswd(8), vipw(8)
       Robert Morris and Ken Thompson, UNIX password security

       User information should (and eventually will) be stored elsewhere.

4th Berkeley Distribution		  March 12, 1989				CHPASS(1)
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