If your question is
How to deploy and undeploy seam app in jboss?this might be an answer:
It kinda depends on how you developed your application.
If you already have your .ear file, I'd say it's rather easy...
Just copy it to the deploy folder of your JBoss AS and restart your JBoss AS.
If you question is 'how to stop and start my server again' it's also easy: open a dos-prompt, navigate to the /bin folder of your JBoss AS and type 'shutdown' to stop the server and 'run' to start the server.
If this doesn't help you, then I can't help you...
You didn't undestand me.
I've got app packaged in .ear and deployed on JBoss 4.2.1
I must to stop working my app and undeploy it from server wihtout restarting/shouting down whole server. Same like remove .ear from /deploy folder.
I need to do it from admin panel in jboss. I've tryed to look for it in jmx-console but don't know how to stop app.