Reset the password for the Pluto Admin site

From Pluto Wiki

First, How do I login to a Linux console?. Then type this sequence:
mysql pluto_main
select * FROM Users;
You will see a list of the users in the database. Then type in this:
update Users set Password=md5("mypassword") where UserName="myusername";
quit;
Where mypassword is the new password and myusername is the username.