screen – how to detach a session from your windowThis article tells you how to install screen, "a full-screen window manager that multiplexes a physical terminal between several processes (typically interactive shells)" [that quote shamelessly stolen from man screen].
Why use screen?If you are a dialup user, screen will allow you to save your session, hang up, and at a later time reconnect and restart your session. If you have only one phone line, that will allow to you make another phone call, save a running job, etc. I’ve already found it to be useful and I’ve only used it once so far!
Installing screenHere’s how I installed screen. Remember, I already had the entire ports tree. You may have to refer to the FreeBSD Handbook to see how to install a port.
# cd /usr/ports/misc/screen # make # make install
Using screenTo start a new screen session, just enter screen. Then start what ever processes you want. To detach a screen session, type "^a d" (that’s "control-a" followed by a "d" for detach). The session will then be put into the background. To reattach a session, type screen -a.
It’s kind of hard to demonstrate this in written form, but I suggest you give it a try. Remember to read the man pages for screen!
Also, you can create a screen session by typing something like this:
screen -S top10 top 10
and it will give you a screen session running the top 10 command.
And you can reattach to a session by typing screen -r which will give you a list of the screen sessions:
[dan@ns:/usr/home/dan] $ screen -r There are several screens on: 12551.top5 (Detached) 12554.top10 (Detached) 12476.top1 (Remote or dead) Type "screen [-d] -r [pid.]tty.host" to resume one of them.
In the above, if you want to go back to the screen we started above, you would type:
screen -r top10
See man screen for more details.