CHPASSWD(8) System Manager's Manual CHPASSWD(8)
chpasswd - update password file in batch
chpasswd [--encrypted] [--md5]
chpasswd reads a file of user name and password pairs from standard
input and uses this information to update a group of existing users.
Without the --encrypted switch, the passwords are expected to be clear-
text. With the --encrypted switch, the passwords are expected to be in
encrypted form. Each line is of the format
The named user must exist. The supplied password will be encrypted as
necessary, and the password age updated, if present.
This command is intended to be used in a large system environment where
many accounts are created at a single time.
The --md5 switch allows using MD5 encryption instead of the default DES
encryption when the supplied passwords are not already in encrypted
The input file must be protected if it contains unencrypted passwords.
passwd(1), newusers(8), useradd(8)
Julianne Frances Haugh (jockgrrlATix.com)