Linux allows tasks to be scheduled and executed using cron and crontab. Crontab will utilize the job scheduler, while cron will execute the tasks.

(a) Write a Linux shell script to capture all the processes run by a user named user1 as well as the current date and time before appending these information to a file named traceLog.txt. Next, move the traceLog.txt file to a directory named backup. Finally, kill all processes owned by user1 and all processes named torrent.

(15 marks)

(b) Configure the crontab to schedule the execution of the shell script in question 5(a) above, assuming that the shell script is located at /home/admin directory. The shell script should be executed at every two hours daily. Append the current date and time followed by the list of all users currently logged into the Linux system to a file named userLog.txt every 40 minutes. Assume that the userLog.txt file is located at /home/admin directory. Schedule a broadcast message every hour on the 28^th day of each month to all users logged in to remind them to do external backup of their personal files. Finally, schedule to reboot the Linux system on every Sunday at 11:55pm.

(10 marks)