Encrypt a password the same way mysql does

I've created a user ... but forgotten the password

mysql> create user 'blayo'@'%' identified by 'right';

Which Linux command line tool can **encrypt the password the same way mysql 5.5 does ?**

mysql> select Password,User from mysql.user
------------------------------------------+-------+
*920018161824B14A1067A69626595E68CB8284CB | blayo |

...to be sure I use the right one

$ tool right
*920018161824B14A1067A69626595E68CB8284CB