I don't get it, that syntax is used all over stackoverflow, but it just doesn't work for me. Like this:

Code:
ns_zombies@5.9.90.148 10.0.3.1 2a01:4f8:162:14cf::2 ~ $ echo "echo hi" > echo.sh
ns_zombies@5.9.90.148 10.0.3.1 2a01:4f8:162:14cf::2 ~ $ chmod +x echo.sh
ns_zombies@5.9.90.148 10.0.3.1 2a01:4f8:162:14cf::2 ~ $ screen -AmdS foo echo.sh
ns_zombies@5.9.90.148 10.0.3.1 2a01:4f8:162:14cf::2 ~ $ screen -ls
No Sockets found in /var/run/screen/S-ns_zombies.