Do you ever need to kick off a long-running command while SSHed to a server, but be able to disconnect and reconnect at will? You can do this with screen.
Before doing anything, start a screen session:
screen
When you’re ready to put your work on hold, detach the screen:
screen -d
If you have a long-running command running, you can detach that screen from a different shell session by specifying the process id:
# look up the process id ps aux | grep SCREEN # detach that screen screen -d <my_process_id>
You can now disconnect from the server safely.
When you reconnect, you can also reconnect to your screen session:
screen -r
Leo on Tech 
Of course this works well but relies on screen being installed. For AIX therefore since it is not I would recommend http://www.perzl.org/aix/index.php?n=Main.Screen
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