Installing screen
The installation of screen is very easy. On OpenSuse system go to yast >> software management and search for package "screen" click on "accept" and install the software
I guess that for Fedora, CentOS, SuSE, and Mandriva there are also screen packages that you can install with yum/yast/urpmi/...
Using screen
With screen you can create one or more sessions in your current SSH terminal. Just run
screen to start it. This creates a screen session or window (although you don't see it as such) in your current SSH terminal:
Press Space or Return to get to the command prompt: Looks like your normal SSH terminal, doesn't it?
Now I'm going to describe the most important screen commands that you need to control screen. These commands begin with CTRL a to distinguish them from normal shell commands.
Ctrl a c - Creates a new screen session so that you can use more than one screen session at once.
Ctrl a n - Switches to the next screen session (if you use more than one).
Ctrl a p - Switches to the previous screen session (if you use more than one).
Ctrl a d - Detaches a screen session (without killing the processes in it - they continue).
To close a screen session where all tasks are finished you can type: exit
Now let's play around with it a little bit. In our screen window we run the command: top
Now let's create another screen session by typing: Ctrl a c
A new, blank screen session opens, and there we run: tail -f /var/log/mail.log
Now you can browse your two screen sessions by running: Ctrl a n or Ctrl a p
To detach a screen session and return to your normal SSH terminal, type: Ctrl a d
Back on your normal SSH terminal, you can run: screen -ls to get a list of your current screen sessions:
There are screens on:To reconnect to one of these sessions, run: screen -r 2477.pts-0.server1
2477.pts-0.server1 (Detached)
2522.pts-0.server1 (Detached)
2 Sockets in /var/run/screen/S-root.
where 2477.pts-0.server1 is the name of one of the sessions from the screen -ls output.
To leave and finish a screen session, finish all current tasks in it (top can be finished by typing q, tail -f /var/log/mail.log can be finished by typing CTRL c) and then type: exit
You will then fall back to another screen session (if you use more than one) or to the normal SSH terminal, if no more screen sessions are open. If you want to learn more about screen, run
man screen
My Connection Dropped - What Can I Do?
Now let's assume you compile a kernel in a screen session, something which normally takes a long time, and suddenly your connection drops. Thanks to screen your work isn't lost. Once your connection is back up, log in to your system with SSH again and run: screen -ls
From the results pick one session (e.g. 2477.pts-0.server1) and reattach to it: screen -r 2477.pts-0.server1
If you picked the right session, you should find your kernel still compiling (if it hasn't finished in the meantime) so that you can continue your work.
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source:http://linuxpoison.blogspot.com/2009/02/135781757115648.html