Install on mysql:

Create a user database on your mysql server.
Here we create a user "rserv" and a database "ratbox_services" on a debian system:

$ su -
# mysql -p
mysql> CREATE USER rserv WITH ENCRYPTED PASSWORD 'password' NOCREATEDB NOCREATEROLE NOCREATEUSER;
mysql> CREATE DATABASE ratbox_services WITH OWNER=rserv;
mysql> \q
# exit
$ mysql -u rserv -p ratbox_services < /usr/share/ratbox-services/lib/schema-mysql.sql

