nispasswd - change NIS+ password information
nispasswd [-ghs] [-D domainname] [username]
nispasswd [-D domainname] [-d [username]]
nispasswd [-l] [-f] [-n min] [-x max] [-w warn] [-D domainname] username
The nispasswd utility changes a password, gecos (finger) field (-g option), home directory (-h option), or login shell (-s option) associated with the username (invoker by default) in the NIS+ passwd table.
Additionally, the command can be used to view or modify aging information associated with the user specified if the invoker has the right NIS+ privileges.
nispasswd uses secure RPC to communicate with the NIS+ server, and therefore, never sends unencrypted passwords over the communication medium.
nispasswd does not read or modify the local password information stored in the /etc/passwd and /etc/shadow files.
When used to change a password, nispasswd prompts non-privileged users for their old password. It then prompts for the new password twice to forestall typing mistakes. When the old password is entered, nispasswd checks to see if it has "aged" sufficiently. If "aging" is insufficient, nispasswd terminates; see getspnam(3C).
The old password is used to decrypt the username's secret key. If the password does not decrypt the secret key, nispasswd prompts for the old secure-RPC password. It uses this password to decrypt the secret key. If this fails, it gives the user one more chance. The old password is also used to ensure that the new password differs from the old by at least three characters. Assuming aging is sufficient, a check is made to ensure that the new password meets construction requirements described below. When the new password is entered a second time, the two copies of the new password are compared. If the two copies are not identical, the cycle of prompting for the new password is repeated twice. The new password is used to re-encrypt the user's secret key. Hence, it also becomes their secure-RPC password. Therefore, the secure-RPC password is no longer a different password from the user's password.
Passwords must be constructed to meet the following requirements:
Network administrators, who own the NIS+ password table, may change any password attributes if they establish their credentials (see keylogin(1)) before invoking nispasswd. Hence, nispasswd does not prompt these privileged-users for the old password and they are not forced to comply with password aging and password construction requirements.
Any user may use the -d option to display password attributes for his or her own login name. The format of the display will be:
username status mm/dd/yy min max warn
or, if password aging information is not present,
The use of nispasswd is strongly discouraged. It is a wrapper around the passwd(1) command.
Using passwd(1) with the -r nisplus option will achieve the same result and will be consistent across all the different name services available. This is the recommended way to change the password in NIS+.
The login program, file access display programs (for example, ls -l), and network programs that require user passwords, for example, rlogin(1), ftp(1), and so on, use the standard getpwnam(3C) and getspnam(3C) interfaces to get password information. These programs will get the NIS+ password information, which is modified by nispasswd, only if the passwd: entry in the /etc/nsswitch.conf file includes nisplus. See nsswitch.conf(4) for more details.
The following options are supported:
The following exit values are returned:
See attributes(5) for descriptions of the following attributes:
keylogin(1), login(1), NIS+(1), nistbladm(1), passwd(1), rlogin(1), domainname(1M), nisserver(1M), getpwnam(3C), getspnam(3C), nis_local_directory(3NSL), nsswitch.conf(4), passwd(4), shadow(4), attributes(5)
NIS+ might not be supported in future releases of the Solaris operating system. Tools to aid the migration from NIS+ to LDAP are available in the current Solaris release. For more information, visit http://www.sun.com/directory/nisplus/transition.html.
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Created 1996-2023 by Maxim Chirkov
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