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yppasswd(1)									      yppasswd(1)

       yppasswd, ypchfn, ypchsh - change your password in the NIS database

       yppasswd [-f] [-l] [-p] [user]
       ypchfn [user]
       ypchsh [user]

       In the old days, the standard passwd(1), chfn(1) and chsh(1) tools could not be used under
       Linux to change the users NIS password, shell and GECOS information. For changing the  NIS
       information, they were replaced by their NIS counterparts, yppasswd, ypchfn and ypchsh.

       Today, this versions are deprecated and should not be used any longer.

       Using  the  command line switches, you can choose whether to update your password -p, your
       login shell -l, or your GECOS field -f, or a combination of them.  yppasswd implies the -p
       option,	if no other option is given. If you use the -f or -l option, you also need to add
       the -p flag.  ypchfn implies the -f option, and ypchsh -l.

       When invoked without the user argument, the account information for the invoking user will
       be  updated,  otherwise that of user will be updated. This option is only available to the
       super-user. If the yppasswdd daemon on the server supports it, you can give the root pass-
       word of the server instead of the users [old] password.

       All  tools  will first prompt the user for the current NIS password needed for authentica-
       tion with the yppasswdd(8) daemon. Subsequently,  the  program  prompts	for  the  updated

       If we use shadowing passwords using passwd.adjunct, SHA-512 will be used for hashing a new
       password by default. If we want to use MD5, SHA_256 or older DES, we need to set the envi-
       ronment variable YP_PASSWD_HASH. Possible values are "DES", "MD5", "SHA-256" and "SHA-512"
       (value is case-insensitive).

       yppasswd or -p
	      Change the user's NIS password.	 The user  is  prompted  for  the  new	password.
	      While  typing  the password, echoing is turned off, so the password does not appear
	      on the screen. An empty password is rejected, as are  passwords  shorter	than  six
	      characters.  The user will then be requested to retype the password to make sure it
	      wasn't	misspelled the first time.

       ypchsh or -l
	      Change the user's login shell. The user is prompted for a new shell,  offering  the
	      old one as default:

		Login shell [/bin/sh]: _

	      To  accept  the  default,  simply  press	return.  To clear the shell field in your
	      passwd(5) file entry (so that the system's default shell is  selected),  enter  the
	      string none.

       ypchfn or -f
	      Change  the  user's full name and related information. Traditionally, some applica-
	      tions expect the GECOS field (field 4) of the passwd(5) file to contain the  user's
	      real  name (as opposed to the login name) plus some additional information like the
	      office phone number. This information is displayed by finger(1) and  probably  some
	      other tools, too.

	      When  setting  the  full	name,  ypchfn  displays  the  following prompts, with the
	      defaults in brackets:

		Name [Joe Doe]:
		Location [2nd floor, bldg 34]:
		Office Phone [12345]:
		Home Phone []:

	      To accept a default, simply press return. To clear a field, enter the string none.

       chfn(1), chsh(1), finger(1),  passwd(5),  passwd(1),  ypcat(1),	yppasswdd(8),  ypserv(8),

       yppasswd   is  part  of	the  yp-tools  package,  which	was  written  by  Thorsten  Kukuk

YP Tools 2.14				    April 2010				      yppasswd(1)
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