There is list of jobs running.pdf is openedimage is openedtext file openedIt's all in fg/bg .Is there any option to close the particular job forcefully? Also, I want to know if the jobs can be closed with the help of a command. 
how to close the jobs one by one? is there any options?
shell;kill;job control
As long as the jobs were all started from your current shell: use 'jobs' to get a list of backgrounded jobs.  Each will have a numeric identifier, starting from '1'.  Then you can bring the job to the foreground with fg %1, send it to the background if it's paused with bg %1, or kill it with kill %1 (use the correct number for the job you're trying to kill, of course).$ jobs$ sleep 20 &[1] 1770$ sleep 30 &[2] 1771$ sleep 40 &[3] 1773$ jobs[1]   Running                 sleep 20 &[2]-  Running                 sleep 30 &[3]+  Running                 sleep 40 &$ kill %2$ jobs[1]   Running                 sleep 20 &[2]-  Terminated              sleep 30[3]+  Running                 sleep 40 &$ jobs[1]-  Running                 sleep 20 &[3]+  Running                 sleep 40 &$ 