HSQLDB 2.2.9：了解server.properties文件

I am running hsqlddb 2.2.9 on ubuntu Linux but I am struggling to understand the server.properties file. With hsqldb installed under /usr/local, when I start the server with java org.hsqldb.server.Server from the place I put the server.properties file, suppose server.properties is:I am running hsqlddb 2.2.9 on ubuntu Linux but