Linux Quiz 4

Sit beside a friend for this quiz

We need a different user to test how chmod permissions work.

We will test chmod using our web directory:

 $HOME/public_html

First, there is the issue of the permissions for your home directory.
If your home directory is blocked to your friend, then it doesn't matter what public_html permissions are, they can't see it.
What chmod instruction do you need so your friend can access (but not do "ls" in) your home directory?
Next, what chmod instruction do you need so your friend can access (but not do "ls" in) your web directory?
Next, what chmod instruction do you need so your friend can "ls" in your web directory? Test that your friend can do an ls.
What command do you need to stop other people doing an "ls"? Test that your friend cannot do an ls.

Make a web page in your public_html directory.
If you do not already have a web page there, this command will make one:

  echo "My web page" > $HOME/public_html/index.html

You can then view the web page through the address:

  https://student.computing.dcu.ie/~youruserid

Is my web site visible if I set the directory permissions as follows: chmod go-rwx public_html
Is my web site visible if I set the directory permissions as follows: chmod go-rx+w public_html
Is my web site visible if I set the directory permissions as follows: chmod go-rw+x public_html
Is my web site visible if I set the directory permissions as follows: chmod o-rw+x public_html
Is my web page visible if I set the permission as follows: chmod -rwx file.html
Is my web page visible if I set the permission as follows: chmod u+rwx file.html
Is my web page visible if I set the permission as follows: chmod +r file.html
What is the minimal protection that your public_html directory needs?

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