http://linuxreviews.org/beginner/jobs/ :

While running a job you can
suspend a job ctrl -z
terminate a job ctrl -c

When a job is suspended it can be moved back to the foreground with `fg` and placed in the background (where it will continue to execute) with `bg`.

Move a suspended job to the foreground fg
Continue a suspended job in the background bg
List all jobs jobs
Kill a job (%N where N is the job number) kill %N && fg
Start a job directly in the background command &