Ciro Santilli

mysqladmin

CLI utility that simplifies MySQL administration tasks.

-u, -p and -h have analogous usage to that of the mysql command.

Login as user root and change its password:

mysqladmin -u root -h localhost -p password

password here is a mysqladmin subcommand. It seems that it is not possible to change the password of another user with this method. Use SET PASSWORD or UPDATE PASSWORD for that instead.