8:chpasswd

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      chpasswd - change user passwords in batch
      
      chpasswd [-D binddn] [-P path] [-c des|md5|blowfish | -e] [file]

Contents 1 DESCRIPTION 2 OPTIONS 3 FILES 4 RELATED 5 CATEGORY

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

RELATED

      passwd(1), passwd(5), shadow(5)

CATEGORY