I'd like to do a one line bash command that automatically does this:
screen -S myserver python myserver.py # inside the new screen CTRL A, D (detach) I think this won't work:
screen -S myserver && python myserver.py because python myserver.py won't be started inside the screen.
You can detach right after starting a program inside of screen:
screen -dmS myserver python myserver.py
From screen's man page
-d -m Start screen in detached mode. This creates a new session but doesn't attach to it. This is useful for system startup scripts.
screen, start a command, and attach: screen -S myserver python myserver.py (previously I always did screen -S myserver and then typing the command manually). The answer from @Stefan M is good, but is not quite like running a command within the screen, because when the command ends, the whole screen will end. If you actually run a command within the screen, then when it quits, you'll be left with a shell.
You can retain that shell with this:
screen -s "/bin/bash" -dmS myserver; screen -S myserver -X stuff "python myserver.py\n"; This will first launch the screen, with a shell, and then send some commands into that shell to run. This will behave exactly as if you typed those commands into the screen yourself.
A more elaborate script is available here: https://unix.stackexchange.com/a/766301/598166
