Step 1 — Installing MySQL

On Ubuntu 20.04, you can install MySQL using the APT package repository.
sudo apt update

Then install the mysql-server package:
sudo apt install mysql-server

Step 2 — Configuring MySQL
Change the root user password with following command. first enter into mysql and then execute the query:

sudo mysql
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'your_password';

Revert to root user password to default mysql password is:
ALTER USER 'root'@'localhost' IDENTIFIED WITH auth_socket;

Step 3
Make your mysql accessible remotely for your Sql bench software. For doing that , open the file using your preferred editor. I am using VI, there are a lot more options like nano, gedit etc.

sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf

In that file, look for the line:

bind-address =

Change that line to:

bind-address =

Save and close the file. Restart the MySQL service with:

sudo systemctl restart mysql
sudo service mysql restart