YPPASSWD(1) User Commands YPPASSWD(1)
NAME
yppasswd - change your network password in the NIS database
SYNOPSIS
yppasswd [
username]
DESCRIPTION
The
yppasswd utility changes the network password associated with the
user
username in the Network Information Service (
NIS) database. If the
user has done a
keylogin(1), and a publickey/secretkey pair exists for
the user in the
NIS publickey.byname map,
yppasswd also re-encrypts the
secretkey with the new password. The
NIS password may be different from
the local one on your own machine.
yppasswd prompts for the old
NIS password, and then for the new one. You
must type in the old password correctly for the change to take effect.
The new password must be typed twice, to forestall mistakes.
New passwords must be at least four characters long, if they use a
sufficiently rich alphabet, and at least six characters long if monocase.
These rules are relaxed if you are insistent enough. Only the owner of
the name or the super-user may change a password; superuser on the root
master will not be prompted for the old password, and does not need to
follow password construction requirements.
The
NIS password daemon,
rpc.yppasswdd must be running on your
NIS server
in order for the new password to take effect.
SEE ALSO
keylogin(1),
login(1),
passwd(1),
getpwnam(3C),
getspnam(3C),
secure_rpc(3NSL),
nsswitch.conf(5),
attributes(7)WARNINGS
Even after the user has successfully changed his or her password using
this command, the subsequent
login(1) using the new password will be
successful only if the user's password and shadow information is obtained
from NIS. See
getpwnam(3C),
getspnam(3C), and
nsswitch.conf(5).
NOTES
The use of
yppasswd is discouraged, as it is now only a wrapper around
the
passwd(1) command, which should be used instead. Using
passwd(1) with
the
-r nis option will achieve the same results, and will be consistent
across all the different name services available.
BUGS
The update protocol passes all the information to the server in one
RPC call, without ever looking at it. Thus, if you type your old password
incorrectly, you will not be notified until after you have entered your
new password.
February 25, 2017
YPPASSWD(1)