Linux command: bg

bg and & If we add an & at the end of a command or script that we are executing it will execute in background

./my-shell-script.sh &
[1] 10233

To pass a command that was executed in foreground to background without killing the process:

1. Pause the process with CTRL + Z

$ ./my-shell-script.sh
^Z
[2]+  Detenido                my-shell-script.sh

Then unpause with:

$ bg
[2]+ my-shell-script.sh &

This process can be brought back with fg command:

$ fg 2
my-shell-script.sh