hi Wolf-Dieter,
i dont understand what do you mean with question:"what kind of virtual machine it is?"
hmm my JBoss5 is running on RHEL5 enviroment & start/stop with folloving command (/etc/init.d/jboss file):
# Compose the startup and shutdown commands.
JBOSS_CMD_START="${JBOSS_HOME}/bin/run.sh -c ${JBOSS_CONF} -b ${JBOSS_HOST}"
JBOSS_CMD_STOP="${JBOSS_HOME}/bin/shutdown.sh -S"
so here in attachment are the boot and server log messages. hope this help :)
gasper