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yppasswd(1)							   yppasswd(1)

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

SYNOPSIS
       [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
       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 (see getlogin(3C)).

       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	 pass‐
       word meets the following construction requirements.

	      ·	 Only the first eight characters are significant.

	      ·	 A  password  can be as few as four characters long if it con‐
		 tains

		    ·  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  con‐
		 tains 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 con‐
		 tains 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, must be running on  the
       master NIS password server to change NIS passwords.  See yppasswdd(1M).

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

       The  root  user's  password  cannot be changed using or Therefore, root
       users must change their password in the files database and then	recon‐
       struct  the NIS maps using the command.	For more information on how to
       use the command, see ypmake(1M).

       User applications that call this routine must be linked with For	 exam‐
       ple,

AUTHOR
       was developed by Sun Microsystems, Inc.

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

								   yppasswd(1)

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