SCREEN:

install:
root@aix41: /mnt/LinuxToolbox_2007_11/RPMS/ppc # ls -l screen*
-rw-r--r--   1 root     sys          282095 Jul 28 21:46 screen-3.9.10-2.aix4.3.ppc.rpm

(check, you have enough free space in /opt, the tool needs about 0,5MB)

 # rpm -Uv screen-3.9.10-2.aix4.3.ppc.rpm

------------------------------

Resume session after lost connection:

screen                                    <--starting screen session (push space or enter to agree the licence)
start a long running process
ctrl-a + d                                <--this will detach your screen seesion (you can logout, but processes are still running)
screen -list                              <--lists the opened screen sessions
   
root@aix31: / # screen -list
There is a screen on:
           479332.pts-0.aix31   (Detached)        <--if you see detached: screen -r will resume earlier session and that's it.   
1 Socket in /tmp/screens/S-root

screen -r                                         <--it will continue the detached session

if there are more detached session, you have to spceify which session to continue:
screen -r 479332.pts-0.aix31                      <--it will continue the detached session
--------------------

if you see attached:
root@aix31: / # screen -list
There is a screen on:
         479332.pts-0.aix31   (Attached)          <--if you see attached first it should be detached then screen -r
1 Socket in /tmp/screens/S-root.

screen -D or screen -D 479332.pts-0.aix31         <--this will detach the screen
------------------------------

Seeing the same session:

1. screen          starts using this utility (push space or enter to agree the licence)
2. login in another window (putty)
3. screen -x       attaching to the already opened screen (with this you can see the same session)
4. exit            terminating from screen (you will see this:screen is terminating)