chpasswd(8)

NAME
chpasswd - change user passwords in batch

SYNOPSIS
chpasswd [-D binddn] [-P path] [-c des|md5|blowfish | -e] [file]

DESCRIPTION
chpasswd changes passwords for user accounts in batch. It reads a list of login and password pairs from standard input or a file and uses this information to update the passwords of this user accounts. The named account must exist and the password age will be updated. Each input line is of the format:

          user_name:password

If the hash algorithmus is not given on the commandline, the value of GROUP_CRYPT or, if not specified, CRYPT from /etc/default/passwd is used as hash algorithmus. If not configured, the traditinal des algorithmus is used.

OPTIONS

-c des|md5|blowfish
    This option specifies the hash algorithmus, which should be used to encrypt the passwords.

-e  The passwords are expected to be in encrypted form. Normally the passwords are expected to be cleartext.

-D, --binddn binddn
    Use the Distinguished Name binddn to bind to the LDAP directory. The user will be prompted for a password for simple authentication.

-P, --path path
    The passwd and shadow files are located below the specified directory path. chpasswd will use this files, not /etc/passwd and /etc/shadow.

FILES
/etc/default/passwd - default values for password hash

SEE ALSO
passwd(1), passwd(5), shadow(5)

AUTHOR
Thorsten Kukuk <kukuk@suse.de>