Question

I am just wondering if I can attach to few different process and see the output on the same session.

For example I start few process in detach mode

screen -dm -S process "cp 111 222"

screen -dm -S process "cp 333 444"

screen -dm -S process "cp 666 777"

At the end I want to attach to all of them and the output in one screen, like with screen -r
Thanks!

Answer 1

You want to start those as separate windows within a single screen session, by using something like

screen -dm -S process cp 111 222
screen -X -S process screen cp 333 444
screen -X -S process screen cp 666 777

(Note lack of quotes; if you quote it, you’ll find the created window reports an error along the lines of Cannot exec 'cp 333 444': No such file or directory, because it takes the quoted command as the name of an executable, not as a command and parameters.)