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I have a work environment on my Ubuntu laptop in which I want to use three different screens.

Eg. in terminal, I usually write 

screen -S mywork
run_server_1

then, ctrl-a c to create a second screen

run_server_2

etc.

I'd like to write a script to automate setting up this environment, but how can I control multiple screens from one script?

Update : I really want to be able to do this from a shell script, not a screen config. file. Is there a way to do that?

interstar
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4 Answers4

5

Reading man pages and tutorials helps

I would say that you want to do is create a file $HOME/.screenrc.multiwin

# read in your normal screenrc
# before anything else
source $HOME/.screenrc
# now start opening windows
# it's possible to set the window title with
# the -t option
# you can also specify the window number
# to launch in
screen -t server1 5 run_server_1
screen -t server2 6 run_server_2

Then running

screen -c $HOME/.screenrc.multiwin

will do what you need

Unreason
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  • Actually, I don't think this is what I want. I really would like to do this in a shell script in which I can do other things too. (And call like any other script.) Not just in a screen "configuration" file. – interstar Jul 02 '10 at 08:32
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    @interstar: run_server_1 can be another script. The above is relatively flexible if the scripts are independent. Alternatively if there is a lot of control flow/interprocess communication what about the following: don't start screens but just start servers with their output redirected to files, then in other terminals/screens you can watch those files. – Unreason Jul 07 '10 at 15:04
  • You can always generate a config to a temporary file and give that file to screen using -c . Since shell scripts are turing complete, it is possible to do almost anything this way, but probably not very easy. – ptman Oct 13 '10 at 06:21
2

Commands can be passed from outside using screen -S sessionname -X command for instance screen -S mywork -X screen run_server_2 would create a new window (same as ctrl-a c) but that window would have run_server_2 executing in it. Unlike doing it by hand,there will not be a shell running in that window, so when run_server_2 exits, the window will be closed.

Controlling multiple screens is simply a matter of making sure they're all named with -S

DerfK
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  • I believe this answer is more universal since it doesn't involve specific mechanisms (like screen's special configuration files), but plain shell scripting. – dess Jun 03 '19 at 15:17
1

I believe tmux is much more easily scriptable than screen for this type of purpose. tmux program accepts its own commands as arguments on the command line, so for example, to launch two windows: "tmux new-session -d '/bin/bash' \; new-window -d 'top'". In the first window, it will run an interactive "bash" shell, and in the second window it will run "top".

Michael Martinez
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0

This is what worked for me

creates new screen session 'mywork' + runs cmd 'run_server_1' in a window titled 'server_1'

screen -dmS mywork -t server_1 sh -c "run_server_1"

automates ctrl-a c to create a second screen window titled 'server_2' and runs cmd 'run_server_2'

screen -S mywork -t server_2  -X screen run_server_2
trohit
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