If you type:
jobs
It should tell you what status are your background jobs in.
See manual for further info.
**Example:**
./job &
Now it is running on background.
You can kill it by:
kill %1
or use any switch like:
-HUP
-TERM
-KILL
In any case in the end you would like to see:
[1]+ Terminated ./job
And this is done again by `jobs` command.