Exercise: chmod

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• Create a file and set the permissions to -r--r--r--
• Then set it to -rwx-------

• Create a second user.
• Create a file by your regular user and make sure the other user cannot see the content.
• Create another file that the user can read but cannot write.
• Create a Hello World shell script. Make sure both of you can run it but only you can write it.
• Create a 3rd user. Make sure only the first 2 users can execute the script.