How can I change root username in MySQL

Question

I\'m running MySQL in Ubuntu, default installation.

How can I change the username from root to another one, let\'s say admin? Preferably from

Answer 1

I just wanted to say that for me, there was no column 'password'.

To change password, the correct field was authentication_string

So the command is

update user set authentication_string=PASSWORD('new password') where user='admin';

I'm no MySQL expert, so I'm not sure exactly why, but what I said is correct, at least in my case.