MySQL should have been installed when you selected the packages. Now you just need to start it and make it start automatically everytime the computer starts. To do so:
#chkconfig --levels 235 mysqld on
#/etc/rc.d/init.d/mysqld start
Now check that networking is enabled. Run:
You should see a line like this:
tcp 0 0 *:mysql *:* LISTEN 2721/mysqld
If it does not, edit /etc/my.cnf and comment out the option skip-networking:
#skip-networking
Now, assing a password for the root user in MySQL, and replace the user root with the user mysql. I'm using the password mythtv.
#mysqladmin -h localhost -u root password mythtv
# mysql -uroot -pmythtv mysql
mysql> UPDATE user SET user='mythtv' WHERE user='root';
mysql> FLUSH PRIVILEGES;
mysql> quit