chpasswd - Unix, Linux Command

NAME

chpasswd - update passwords in batch mode

SYNOPSIS

Tag	Description
chpasswd [options]

DESCRIPTION

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:

user_name:password

By default the supplied password must be in clear-text. Default encryption algorithm is DES. Also the password age will be updated, if present.

This command is intended to be used in a large system environment where many accounts are created at a single time.

OPTIONS

The options which apply to the chpasswd command are:

Tag	Description
-e, --encrypted
	Supplied passwords are in encrypted form.
-h, --help
	Display help message and exit.
-m, --md5
	Use MD5 encryption instead DES when the supplied passwords are not encrypted.

CAVEATS

Remember to set permissions or umask to prevent readability of unencrypted files by other users.