mysql通过用户修改root,如何在MySQL中更改root用户名

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 the command line.

解决方案

After connecting to MySQL run

use mysql;

update user set user='admin' where user='root';

flush privileges;

That's it.

If you also want to change password, in MySQL < 5.7, run

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

before flush privileges;. In MySQL >= 5.7, the password field in the user table was renamed to authentication_string, so the above line becomes:

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