In this tutorial im going to solve this issue ,The error message “Command ‘mysql’ not found” means that your system cannot find the mysql command. This can happen for a few reasons:

• MySQL is not installed on your system.
• MySQL is installed on your system, but the directory containing the mysql binary is not in your system’s path.
• The mysql command has been renamed or moved to a different location.

Solution :-

apt install mysql-client-core-8.0
sudo apt install mysql-client

This command installs the MySQL client package, which includes additional utilities and libraries.

Once the installation is finished, you can try running mysql again:

root is a username whatever having you put

/opt/lampp/bin/mysql -u root -p

Now root set successfully run below command

CREATE USER 'wizbrand_learning'@'localhost' IDENTIFIED BY '8789';
GRANT ALL PRIVILEGES ON . TO 'wizbrand_learning'@'localhost';
FLUSH PRIVILEGES;

Thanks for learning..👍👍