You can use the predefined configuration files as templates to create your own.
For example, the following configuration file starts the database mydb.db on the database server named Elora, with a 32MB cache and a 20-minute checkpoint interval. It allows anyone to start or stop databases and load data, limits user connections to 10, has a catalog page size of 4096 bytes, has a default client connection timeout of 72 hours, uses TCP/IP as a network protocol, and has a specified port number of 1870:
-n Elora -c 32m -gc 20 -gd all -gl all -gm 10 -gp 4096 -ti 4400 -x tcpip(port=1870) path\mydb.db
start_iq @mydb.cfg