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           kpasswd [-x] [-principal <user name>]
               [-password <user's password>]
               [-newpassword <user's new password>] [-cell <cell name>]
               [-servers <explicit list of servers>+] [-pipe] [-help]
           kpasswd [-x] [-pr <user name>] [-pa <user's password>]
               [-n <user's new password>] [-c <cell name>]
               [-s <explicit list of servers>+] [-pi] [-h]


           The kpasswd command changes the password recorded in an Authentication
           Database entry on the obsolete Authentication Server. By default, the
           command interpreter changes the password for the AFS user name that
           matches the issuer's local identity (UNIX UID). To specify an alternate
           user, include the -principal argument. The user named by the -principal
           argument does not have to appear in the local password file (the
           /etc/passwd file or equivalent).
           By default, the command interpreter sends the password change request
           to the Authentication Server running on one of the database server
           machines listed for the local cell in the
           /etc/openafs/server/CellServDB file on the local disk; it chooses the
           machine at random. It consults the /etc/openafs/ThisCell file on the
           local disk to learn the local cell name. To specify an alternate cell,
           include the -cell argument.
           Unlike the UNIX passwd command, the kpasswd command does not restrict
           passwords to eight characters or less; it accepts passwords of
           virtually any length. All AFS commands that require passwords
           (including the klog, kpasswd, and AFS-modified login utilities, and the
           commands in the kas suite) accept passwords longer than eight
           characters, but some other applications and operating system utilities
           do not. Selecting an AFS password of eight characters or less enables
           the user to maintain matching AFS and UNIX passwords.
           The command interpreter makes the following checks:
           ?   If the program kpwvalid exists in the same directory as the kpasswd
               command, the command interpreter pass the new password to it for
               verification. For details, see kpwvalid(8).
           ?   If the -reuse argument to the kas setfields command has been used
               to prohibit reuse of previous passwords, the command interpreter
               verifies that the password is not too similar too any of the user's
               previous 20 passwords. It generates the following error message at
               the shell:
                  Password was not changed because it seems like a reused password
               To prevent a user from subverting this restriction by changing the
               password twenty times in quick succession (manually or by running a
           -x  Appears only for backwards compatibility.
           -principal <user name>
               Names the Authentication Database entry for which to change the
               password. If this argument is omitted, the database entry with the
               same name as the issuer's local identity (UNIX UID) is changed.
           -password <user's password>
               Specifies the current password. Omit this argument to have the
               command interpreter prompt for the password, which does not echo
                  Old password: current_password
           -newpassword <user's new password>
               Specifies the new password, which the kpasswd command interpreter
               converts into an encryption key (string of octal numbers) before
               sending it to the Authentication Server for storage in the user's
               Authentication Database entry.
               Omit this argument to have the command interpreter prompt for the
               password, which does not echo visibly:
                  New password (RETURN to abort): <new_password>
                  Retype new password: <new_password>
           -cell <cell name>
               Specifies the cell in which to change the password, by directing
               the command to that cell's Authentication Servers. The issuer can
               abbreviate the cell name to the shortest form that distinguishes it
               from the other cells listed in the local /etc/openafs/CellServDB
               By default, the command is executed in the local cell, as defined
               ?   First, by the value of the environment variable AFSCELL.
               ?   Second, in the /etc/openafs/ThisCell file on the client machine
                   on which the command is issued.
           -servers <explicit list of servers>
               Establishes a connection with the Authentication Server running on
               each specified machine, rather than with all of the database server
               machines listed for the relevant cell in the local copy of the
               /etc/openafs/CellServDB file. The kpasswd command interpreter then
               sends the password-changing request to one machine chosen at random
               from the set.
               Suppresses all output to the standard output stream or standard
               error stream. The kpasswd command interpreter expects to receive
               all necessary arguments, each on a separate line, from the standard
              New password (RETURN to abort):
              Verifying, please re-enter new_password:




           kas_setfields(8), kas_setpassword(8), klog(1), kpwvalid(8)


           IBM Corporation 2000. <> All Rights Reserved.
           This documentation is covered by the IBM Public License Version 1.0.
           It was converted from HTML to POD by software written by Chas Williams
           and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

    OpenAFS 2012-03-26 KPASSWD(1)


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