(a) Experiment with starting processes in the background, managing those processes, and changing the priority:
remove the echo commands from the looper script
start this script in the background by using the & (example: ./looper & )
use the jobs (note the job ID with the jobs command) and ps
move it to the foreground using the fg command followed by the job number, use CRTL/Z to stop it and return it to the background using the bg command and then kill the process.
TO HAND IN: Take a screen shot of the last 10 commands in your history for (a) change the priority level of a process
run your looper2 script in the background and note the NICE and PRI levels using the ps –l command issue a renice +15 PID and notice the results
start a process with nice –n 19 with your command (maybe a looper script), notice the results
clean up all of your Zombied and Stopped processes