$ screen -d -m -S some_name ping my_router
-d -m start
screen in "detached" mode. This creates a new session but doesn't attach to it.
-S some_name gives the screen session a label, so you can easily re-attach to it with
screen -R some_name
- The shell prompt returns immediately, and of course you can logout too, the
screen session will continue to run happily.
- When the specified program exits (in this example
screen window will also exit, and if there are no other windows in the
screen session, then the
screen session itself will also exit.