On Ubuntu 18.04, I was able to shut down a running HSQLDB instance in server mode with the following one-liner: java -cp $CLASSPATH:/usr/share/java/hsqldbutil.j
On Ubuntu 18.04, I was able to shut down a running HSQLDB instance in server mode with the following one-liner: java -cp $CLASSPATH:/usr/share/java/hsqldbutil.j