Run tasks in the background
bash lets you runone or more tasks in the background, and selectively suspend or resume any ofthe current tasks (or “jobs”). To run a task in the background, addan ampersand (&) to the end of its command line. Here’s an example:
bash> tail -f /var/log/messages &
 614Eachtask back-grounded in this manner in assigned a job ID, which is printed to theconsole. A task can be brought back to the foreground with the command fgjobnumber, where jobnumber is the job IDof the task you wish to bring to the foreground. Here’s an example:
bash> fg 1Alist of active jobs can be obtained at any time by typing jobs at the bash prompt.