To start mysql, run
mysqld_safe &. The ampersand at the end starts the process in the background, so you can continue to work while it runs. Most likely, it needs root privileges to run, so add
sudo to the front if it doesn't work without (you will need to be logged in as an administrator).
By default, there is no
my.cnf file. Defaults are used automatically. There are a few different starting files in the
support-files folder, for different usage styles. You can copy any of them to start with, and place the file in any of these locations (in order searched): /etc/my.cnf /etc/mysql/my.cnf $MYSQL_DIR/etc/my.cnf ~/.my.cnf