Create the user
mysql> CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';This will create a user with username as it's username and the password is password. "localhost" means that you will only be able to connect to MySQL when you are logged on to the server where MySQL is running.
If you change "localhost" to "%", you will be able to log on to the server from anywhere and if you just want a certain IP address to get access to can write that there instead.
Grant the permissions
mysql> GRANT ALL PRIVILEGES ON *.* TO 'username'@'localhost';When the user is created we need to grant it privileges. "*.*" means that we grant the privileges on all databases and on all tables.
If you just want to user to access one single database, you can use this syntax instead.
GRANT ALL PRIVILEGES ON databasename.* TO 'username'@'localhost';Flush the privileges
mysql> FLUSH PRIVILEGES;When you have done changes to the permissions like adding a user or just changing what access he or she has, you need to flush the MySQL cache. The only command you need to run is FLUSH PRIVILEGES and the cache will be flushed.