Create or change a password using passwd Linux Command

passwd

passwd [options] [user]

Create or change a password associated with a user name. Only the owner or a privileged user may change a password. Owners need not specify their user name. Users can change their own passwords. For any other operation, you must be root.

Options

-d, --delete
Delete the password for the user's account.

-f, --force
Force the operation. Overrides -u.

-?, --help
Display a help message describing the options. See also --usage.

-i days, --inactive=days
Set the number of days after a password has expired before the account is disabled.

-k, --keep-tokens
Keep passwords (authentication tokens) that have not expired.

-l, --lock
Lock the user's account.

-n days, --minimum=days
Set the minimum number of days that the password is valid.

-S, --status
Print the status of the user's password.

--stdin
Read new passwords from standard input.

-u, --unlock
Unlock the user's account

--usage
Display a brief usage message. See also --help.

-w days, --warning=days
Set the number of days of warning users will get before their password expires.

-x days, --maximum=days
Set the maximum number of days that the password is valid.