12. Change the access right of your file ex1 so that ONLY you have the read/write...

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12. Change the access right of your file ex1 so that ONLY you have the read/write access to the file. What was the command used? List the files in your directory to confirm your answer. 13. Create a job sleep 500. Stop the job and move it to the background. What were the commands used? 14. Use ps to view the processes that the system is running. 15. Terminate the sleep process. What was the command used? 12. Change the access right of your file ex1 so that ONLY you have the read/write access to the file. What was the command used? List the files in your directory to confirm your answer. 13. Create a job sleep 500. Stop the job and move it to the background. What were the commands used? 14. Use ps to view the processes that the system is running. 15. Terminate the sleep process. What was the command used?