CHPASSWD(8) System Management Commands CHPASSWD(8)
chpasswd - update passwords in batch mode
chpasswd reads a list of user name and password pairs from standard
input and uses this information to update a group of existing users.
Each line is of the format:
By default the supplied password must be in clear-text. Default
encryption algorithm is DES. Also the password age will be updated, if
This command is intended to be used in a large system environment where
many accounts are created at a single time.
The options which apply to the chpasswd command are:
Supplied passwords are in encrypted form.
Display help message and exit.
Use MD5 encryption instead of DES when the supplied passwords are
Remember to set permissions or umask to prevent readability of
unencrypted files by other users.
passwd(1), newusers(8), useradd(8).
System Management Commands 02/25/2007 CHPASSWD(8)