This article will talk about overview of all system properties in JBoss AS7+ including OS system properties and properties specified on command line using -D, -P or --properties arguments.
CLI
$ ./bin/jboss-cli.sh --connect controller=IP_ADDRESS
STANDALONE
[standalone@IP_ADDRESS:9999 /] /core-service=platform-mbean/type=runtime:read-attribute(name=system-properties)
DOMAIN-SERVER
[domain@IP_ADDRESS:9999 /] /host=master/server=server-one/core-service=platform-mbean/type=runtime:read-attribute(name=system-properties)
DOMAIN-DC
[domain@IP_ADDRESS:9999 /] /host=master/core-service=platform-mbean/type=runtime:read-attribute(name=system-properties)
Web console
TBD, see AS7-2172 -- Provide the ability to view OS system properties within the console.
Reference
http://community.jboss.org/wiki/JBossAS7HowDoI
http://community.jboss.org/wiki/JBossAS7SystemProperties