QUESTION 5 What is the numeric or Octal version of the following permissions for

Question

QUESTION 5

What is the numeric or Octal version of the following permissions for a file? -rwx r-- r--

Or, put a different way: u=rwx,g=r,o=r

744

655

755

311

QUESTION 6

You want to change the permissions on a directory named public_files so that everyone else (the "other" category of users) has the ability to go into the directory and read files, but not write to the directory.

Which command would do that for you?

chmod o=rx public_files

chmod ugo+ public_files

chmod go=r public_files

chmod 777 public_files

QUESTION 7

You want to remove write permissions for everyone including yourself on a file named "my-homework.txt"

Which command would do that for you?

chmod a-w my-homework.txt

umask 755 my-homework.txt

chmod o-w my-homework.txt

rm -w my-homework.txt

QUESTION 8

What piece of information do you need to know in order to use the su command?

a.The username of one of the administrator accounts

The password for the root account

The password for the user you are trying to become

The index number for an administrative user in the user account database

QUESTION 9

A file named "homework" had the following permissions: -rwxr--r--

Which command could have been typed to change the permissions to this: --wx-w---x

chmod 465 homework

chmod 321 homework

chomd g-r homework

chmod a-r homework

QUESTION 10

Why migh you use sudo instead of su?

Because sudo always asks for confirmation before executing a command, while su does not.

Because sudo allows you to use your own password to quickly run a task with administrative privilges, you are less tempted to endanger your system by running as root all the time.

Because sudo can make you a sandwich.

Because su is old and usually not present on Unix.

744

655

755

311

Explanation / Answer

QUESTION 5

Answer : a that is 744

taking r=4, w=2, x=1.

rwx r—r = 4+2+1 4 4 = 744

QUESTION 6

Answer : a that is chmod o=rx public_files

QUESTION 7

Answer : a that is chmod a-w my-homework.txt

Removing all write privileges for every one

QUESTION 8

Answer : C

QUESTION 9

Answer : C that is chomd g-r homework

g indicates group

-r indicates remove read access

QUESTION 10

Answer : B

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