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 nispasswd(1)							nispasswd(1)




 NAME
      nispasswd - change NIS+ password information

 SYNOPSIS
      nispasswd [ -ghs ] [ -D domainname ] [ username ]

      nispasswd -a

      nispasswd -D domainname ] [ -d [ username ] ]

      nispasswd [ -l ] [ -f ] [ -n min ] [ -x max ] [ -w warn ]
      [ -D domainname ] username

 DESCRIPTION
      nispasswd changes a password, gecos (finger) field (-goption), home
      directory (-hoption), or login shell (-soption) associated with the
      username (invoker by default) in the NIS+ passwd table.

      Additionally, the command can be used to view or modify aging
      information associated with the user specified if the invoker has the
      right NIS+ privileges.

      nispasswd uses secure RPC to communicate with the NIS+ server, and
      therefore, never sends unencrypted passwords over the communication
      medium.

      nispasswd does not read or modify the local password information
      stored in the /etc/passwd file.

      When used to change a password, nispasswd prompts non-privileged users
      for their old password. It then prompts for the new password twice to
      forestall typing mistakes. When the old password is entered, nispasswd
      checks to see if it has aged sufficiently.  If aging is insufficient,
      nispasswd terminates; see getpwent(3C).

      The old password is used to decrypt the username's secret key.  If the
      password does not decrypt the secret key, nispasswd prompts for the
      old secure-RPC password.	It uses this password to decrypt the secret
      key.  If this fails, it gives the user one more chance.  The old
      password is also used to ensure that the new password differs from the
      old by at least three characters.	 Assuming aging is sufficient, a
      check is made to ensure that the new password meets construction
      requirements described below. When the new password is entered a
      second time, the two copies of the new password are compared. If the
      two copies are not identical, the cycle of prompting for the new
      password is repeated twice. The new password is used to re-encrypt the
      user's secret key.  Hence, it also becomes their secure-RPC password.

      Passwords must be constructed to meet the following requirements:





 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000






 nispasswd(1)							nispasswd(1)




	   + Each password must have at least six characters. Only the first
	     eight characters are significant.

	   + Each password must	 contain  at  least  two  alphabetic
	     characters	 and at least one numeric or special character.	 In
	     this case, "alphabetic" refers to all upper or lower case
	     letters.

	   + Each password must differ from the	 user's	 login username and
	     any  reverse or circular shift of that login username.  For
	     comparison purposes, an upper case letter	and  its
	     corresponding lower case letter are equivalent.

	   + New passwords must differ from  the  old  by  at  least three
	     characters.  For  comparison purposes, an upper case letter and
	     its corresponding lower case letter are equivalent.

      Network administrators, who own the NIS+ password table, may change
      any password attributes if they establish their credentials (see
      keylogin(1)) before invoking nispasswd.  Hence, nispasswd does not
      prompt these privileged-users for the old password and they are not
      forced to comply with password aging and password construction
      requirements.

      Any user may use the -d option to display password attributes for his
      or her own login name.  The format of the display will be:

	   username status mm/dd/yy min max warn

      or, if password aging information is not present,

	   username status

      where

      username	  The login ID of the user.

      status	  The password status of username: "PS" stands for password
		  exists or locked, "LK" stands for locked, and "NP" stands
		  for no password.

      mm/dd/yy	  The date password was last changed for username.  (Note
		  that all password aging dates are determined using
		  Greenwich Mean Time and, therefore, may differ by as much
		  as a day in other time zones.)

      min	  The minimum number of days required between password
		  changes for username.

      max	  The maximum number of days the password is valid for
		  username.



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 nispasswd(1)							nispasswd(1)




      warn	  The number of days relative to max before the password
		  expires that the username will be warned.

    Options
      -g	     Change the gecos (finger) information.

      -h	     Change the home directory.

      -s	     Change the login shell.  By default, only the NIS+
		     administrator can change the login shell.	User will be
		     prompted for the new login shell.

      -a	     Show the password attributes for all entries.  This
		     will show only the entries in the NIS+ passwd table in
		     the local domain that the invoker is authorized to
		     "read".

      -d [username]  Display password attributes for the caller or the user
		     specified if the invoker has the right privileges.

      -l	     Locks the password entry for username.  Subsequently,
		     login(1) would disallow logins with this NIS+ password
		     entry.

      -f	     Force the user to change password at the next login by
		     expiring the password for username.

      -n min	     Set minimum field for username. The min field contains
		     the minimum number of days between password changes for
		     username. If min is greater than max, the user may not
		     change the password. Always use this option with the -x
		     option, unless max is set to -1 (aging turned off). In
		     that case, min need not be set.

      -x max	     Set maximum field for username. The max field contains
		     the number of days that the password is valid for
		     username. The aging for username will be turned off
		     immediately if max is set to -1. If it is set to 0,
		     then the user is forced to change the password at the
		     next login session and aging is turned off.

      -w warn	     Set warn field for username. The warn field contains
		     the number of days before the password expires that the
		     user will be warned whenever he or she attempts to log
		     in.

      -D domainname  Consult the passwd.org_dir table in domainname. If this
		     option is not specified, the default domainname
		     returned by nis_local_directory() will be used. This
		     domainname is the same as that returned by
		     domainname(1).



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 nispasswd(1)							nispasswd(1)




 RETURN VALUE
      The nispasswd command exits with one of the following values:

	   0	SUCCESS.

	   1	Permission denied.

	   2	Invalid combination of options.

	   3	Unexpected failure.  NIS+ passwd table unchanged.

	   4	NIS+ passwd table missing.

	   5	NIS+ is busy.  Try again later.

	   6	Invalid argument to option.

	   7	Aging is disabled.

 AUTHOR
      nispasswd was developed by Sun Microsystems, Inc.

 SEE ALSO
      keylogin(1), login(1), nis+(1), nistbladm(1), passwd(1),
      domainname(1), getpwent(3C), nsswitch.conf(4), passwd(4).

 NOTES
      The login program, file access display programs (for example, 'ls -l')
      and network programs that require user passwords (for example,
      rlogin(1), ftp(1), etc.) use the standard getpwent(3C) interface to
      get password information. These programs will get the NIS+ password
      information, which is modified by nispasswd, only if the passwd: entry
      in the /etc/nsswitch.conf file includes nisplus.	See nsswitch.conf(4)
      for more details.




















 Hewlett-Packard Company	    - 4 -   HP-UX Release 11i: November 2000