Question: 5. Do some research/discussion, find out what the following command does: rm -rf testing. 6. What does cd .. do? How to get back to

5. Do some research/discussion, find out what the following command does: "rm -rf testing".

6. What does "cd .." do? How to get back to home directory?

7. What's /etc/passwd file? What's /etc/shadow file for? Try "cat /etc/passwd". What did you get? Try "cat /etc/shadow". What did you get? Why wasn't the file content displayed?

8. Use examples to show what "chmod" does.

9. Try "wget www.uw.edu" (Links to an external site.)Links to an external site. and figure out what "wget" does. You may discuss on the class discussion platform.

0. Run "ps -ef". What did you find? What does "-e" do? What does "-f" do?

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