Let's start by stopping the currently running MySQL database.
$ sudo systemctl stop mysql.service
Next, create set proper permission to the folder to be used by MySQL process to store and access socket file.
$ sudo mkdir -p /var/run/mysqld
$ sudo chown mysql:mysql /var/run/mysqld
Then, we can start MySQL with some options.
$ sudo /usr/sbin/mysqld --skip-grant-tables --skip-networking &
Verify the the process is running as expected.
$ jobs
[1]+ Running mysqld --skip-grant-tables --skip-networking &
Now we can access MySQL database without password.
$ mysql -u root
Let's flush the session.
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
Select the database to be use.
mysql> use mysql;
Database changed
Update the root password.
mysql> UPDATE user SET authentication_string=PASSWORD("secret") WHERE User='root';
Query OK, 0 rows affected, 1 warning (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 1
For this example, I just use secret, but please, use something else.
We have to set plugin for the root.
mysql> UPDATE user SET plugin="mysql_native_password" WHERE User='root';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 0
We're done here, so we can quit the session:
mysql> quit
Now, we need to stop the current MySQL process:
$ sudo pkill mysqld
Verify the process is terminated:
$ jobs
[1]+ Done mysqld --skip-grant-tables --skip-networking
Finally, start MySQL process.
$ sudo systemctl start mysql.service
Done!
References:
Thank you for pointing it out, I will update the gist later.