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 yppasswd(1)							 yppasswd(1)




 NAME
      yppasswd - change login password in Network Information System (NIS)

 SYNOPSIS
      yppasswd [name]

    Remarks
      The Network Information Service (NIS) was formerly known as Yellow
      Pages (YP).  The functionality remains the same; only the name has
      changed.

 DESCRIPTION
      yppasswd changes or installs a password associated with the login name
      in the Network Information System (NIS).	The NIS password can be
      different from the one on your own machine.  If name is omitted, it
      defaults to the name returned by getlogin() (see getlogin(3C)).

      yppasswd prompts for the old NIS password (even if it does not exist),
      then twice for the new one.  The old password must be entered
      correctly for the change to take effect.	Checks occur to ensure that
      the new password meets the following construction requirements.

	   +  Only the first eight characters are significant.

	   +  A password can be as few as four characters long if it
	      contains

		 +  at least one special character or

		 +  a mixture of numeric, uppercase and lowercase letters.

	   +  A password can be as few as five characters long if it
	      contains a mixture of

		 +  uppercase and lowercase letters or

		 +  numeric and either uppercase or lowercase letters.

	   +  A password must contain at least six characters if it contains
	      only monocase letters.

      All these rules except the first are relaxed if you try three times to
      enter an unacceptable new password.  You cannot, however, enter a null
      password.

      Only the owner of the name or the superuser can change a password.

      The Network Information System password daemon, yppasswdd(1M), must be
      running on the master NIS password server to change NIS passwords.





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






 yppasswd(1)							 yppasswd(1)




 WARNINGS
      The password update protocol passes the old and new passwords to the
      master NIS server at once.  Thus, if the old NIS password is
      incorrect, no notification is given until the new NIS password is
      successfully entered.

      The yppasswd password construction rules are different from those of
      the HP-UX passwd command (see passwd(1)).

      User applications that call this routine must be linked with
      /usr/include/librpcsvc.a.	 For example,

	   cc my_source.c -lrpcsvc

 AUTHOR
      yppasswd was developed by Sun Microsystems, Inc.

 SEE ALSO
      id(1), passwd(1), su(1), yppasswdd(1M), getlogin(3C), yppasswd(3N),
      ypfiles(4).


































 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000