In UNIX or Linux operating system, you have the ability to switch any jobs to run in background or foreground.
Background to Foreground Job
1. Below program is running on background.
./R3trans -d &
2. Press Ctrl + z to suspend the program and you will get below notification.
[1] 19054
3. Enter command fg with the following number 1.
fg 1
4. The program will now running on foreground.
./R3trans -d
This is ./R3trans version 6.23
(release 720 - 17.09.12 - 20:12:05 ).
unicode enabled version
./R3trans finished (0000).
Foreground to Background Job
1. Below program is running on foreground.
./R3trans -d
2. Press Ctrl + z to suspend the program and you will get below notification.
[1] 1876
3. Enter command bg with the following number 1.
bg 1
4. The program will now running on background.
./R3trans -d &;
This is ./R3trans version 6.23
(release 720 - 17.09.12 - 20:12:05 ).
unicode enabled version
./R3trans finished (0000).