Linux – How to run a second command in same screen session

gnu-screenlinux

I'm starting the first command in screen like this:

screen -d -m -S testen -t lalala watch df -h

which gives me a screen session running in the background and I can reconnect at a later time.

How can I run a second command in a new window in the same screen session?

Best Answer

Start a named screen session (-S) with a named window (-t) adapting to the terminal size (-A) in detached mode (-d -m):

screen -S mySessionName -t myWinName0 -A -d -m

Start another named window (-t) in the same screen session (-S):

screen -S mySessionName -X screen -t myWinName2

Stuff a few commands (-X stuff $'cmds') into the first named window (-p) in the session (-S):

screen -S mySessionName -p myWinName0 -X stuff $'echo myWinName0\necho cmd1\necho cmd2\n'

Stuff a few commands (-X stuff $'cmds') into the second named window (-p) in the session (-S):

screen -S mySessionName -p myWinName1 -X stuff $'echo myWinName1\necho cmd1\necho cmd2\n'

List the screen sessions and reattach to see what happened:

screen -ls
screen -r mySessionName

Note: The linefeed (\n) simulates pressing Enter. You could use semicolons to separate commands as well.

Related Solutions

Send command to an already running screen session

Actually it's quite simple. You can use the following:

screen -S sessionname -X stuff 'command'`echo -ne '\015'`

echo -ne '\015' emulates pressing the Enter key.

NOTE: that 'stuff' is a screen command. http://www.gnu.org/software/screen/manual/screen.html#Stuff

Linux – Auto-Reconnect SSH Connections with Specific ‘Screen’ Session

You can run this: ssh -t hostname screen -r 3453 to reconnect. If you want to do it in a loop I use the following in a script.

while true; do
    ssh -t -o BatchMode=yes eeepc-rsi "screen -r 3453"
    sleep 2
done

This works best if you have ssh-keys setup so you can login without typing in your password. I'd also recommend that you look at tmux, a more modern implementation of screen. I actually use the above script with screen. You probably also want to use a named screen session rather than just using the pid like you do in your example.

Best Answer

Related Solutions

Send command to an already running screen session

Linux – Auto-Reconnect SSH Connections with Specific ‘Screen’ Session

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