Lab 9

Part I

Begin by logging into your CLI Virtual Machine. (You should be able to ssh to it now, right?).

Open a second ssh terminal to scratch.cs.dixie.edu and run the command launch_lab9 <ip address>. You should replace the <ip address> with the ip of your virtual machine. If you have successfully copied your keys over from a previous assignment, this command will prep your machine to do this lab. If you re-run this command, it will restart any processes that you kill later on.

Perform the following tasks on your virtual machine:

• Kill the processes with the names of grumpy.sh, dopey.sh.
• Find the PID of the sneezy.sh process and put it in a file /mypid.txt (NOTE: not in your home directory. The file should contain a number, thats it!!) (You will need to use sudo powers to do this. Something like: sudo vim /mypid.txt.)
• Find the parent process ID of the doc.sh process and put it in a file /myparent.txt (NOTE: not in your home directory. The file should contain a number, thats it!!)
• Find the start time of the bashful.sh process and put it in a file /mytime.txt (NOTE: not in your home directory. The file should contain a time like 10:04. If you launched it a few days ago, it will display a date like Mar04, instead of a time.)
• Install the cmatrix program.
• In a different terminal - ssh into your VM and run the cmatrix program. Keep this terminal open so the program keeps running.

Part II

Create the following cron jobs on your CLI Virtual Machine in your users crontab file (DO NOT use sudo)

• A cron job that runs every 5 mintes and
  • Redirects the output of the ps command to a file in your $HOME directory called ps.log
• A cron job that runs every day at 3pm and
  • echo’s “The current date is: “ and the results of the date command
  • The command redirects that output to ~/mydate
• A cron job that runs the first day of every month at midnight and
  • Removes all the files in the /tmp directory that end in txt. HINT: use a wildcard * in your command.

To pass off

Run the grade_lab9 command from scratch. Pass in the ip address of your machine. Something like: grade_lab9 144.38.xx.yy. Take a screenshot of the results and upload to scratch.

Last Updated 03/06/2020