Ubuntu under root username does not go to MySQL, how to check the user name and password, how to change the root password

Mysql-u Root-p Press ENTER, after entering the password, you are prompted for access denied......ues password yes/no error.

The first step:

Then you need to go into the/etc/mysql directory, then sudo vim/vi debian.cnf to view the username and password inside, then use the username and password in this file to enter MySQL, If the user name in DEBIAN.CNF is Debian-sys-maint, then:

Mysql-u Debian-sys-maint-p Press ENTER, you need to enter the password, copy the password in debian.cnf (do not enter manually, because it is prone to error).

Now you can get into MySQL.

Step Two:

Change person root password

Log in to the MySQL client as per the previous step
mysql> use MySQL;
Database changed
mysql> Update user Set Password=password (' New password ') where user= ' root ';
Query OK, 4 rows Affected (0.00 sec)
Rows Matched:4 Changed:4 warnings:0
mysql> flush Privileges;
Query OK, 0 rows Affected (0.00 sec)
Mysql> quit

Step Three:

Login with the newly changed root and password to view.