Use screen run background program in linux server

$screen
$run batch command
Press Ctrl-a,d

$screen -ls

There are screens on:

15914.pts-1.centos (Detached)

15887.pts-0.centos (Detached)

2 Sockets in /var/run/screen/S-root.

$screen -r 15914

(& , nohup)