NAME

yppasswd − change login password in Network Information System

SYNOPSIS

yppasswd [name]

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 super-user can change a password. 

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

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)).

Password aging, as described in passwd(1) and passwd(4), is not implemented in the Network Information System password database.

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), yppasswdd(3N), ypfiles(4). 

INTERNATIONAL SUPPORT

8-bit data, messages

Hewlett-Packard Company  —  HP-UX Release 9.10: April 1995