Module 4

Question 1

What command was given to change the permission to the file below? (Select two)

[before] -rw-rw-r–. 1 user1 user1 5494 Oct 11 14:20 file1

[after] -rwxr-xr–. 1 user1 user1 5494 Oct 11 14:20 file1

• chmod 664 file1
• chmod 754 file1
• chmod u+x,g+x-w file1
• chmod u=rwx,g=rx,o=x file1

Answer 1

• chmod 754 file1

- chmod u+x,g+x-w file1

Question 2

cp command will fail if you try to copy a directory unless you specify the -r option.

• True
• False

Answer 2

True

Question 3

Which command is used to find the directories under user1’s home directory?

• find ~user1 -name directories
• find directories ~user1
• find -type d ~user1
• find ~user1 -type d

Answer 3

find ~user1 -type d

Question 4

Directories have inodes, but they do not have their own data blocks.

• True
• False

Answer 4

False

Question 5

What can other members do to the directory “Heros”?

drwxr-xr–. 2 user1 user1 4096 Oct 2 13:32 Heros

• List the content of the directory
• Add or remove files to and from the directory
• Enter the directory
• Nothing

Answer 5

Nothing

Question 6

What can the group members do to the directory “Heros”? (Select two)

drwxr-xr–. 2 user1 4096 Oct 2 13:32 Heros

• List the content of the directory
• Add or remove files to and from the directory
• Enter the directory
• Nothing

Answer 6

List the content of the directory

Enter the directory

Question 7

Which one describes a hard link?

• A separate data block exists for a hard link
• The target file can be on a different partition
• Share the inode of the target file
• Deleting the target file will make the linked file dysfunctional

Answer 7

Share the inode of the target file

Question 8

Find the match.

• /etc
• /var
• /dev
• /usr/bin

Answer 8

/etc configuration files

/var log files and spool

/dev device files

/usr/bin Linux commands used by all users

Question 9

Which command is used to find the location of a file? (Select three)

• find
• locate
• which
• where

Answer 9

find

locate

which

Question 10

What can user1 do to “file1”? (Select two)

-rw-r—x. 1 user1 user1 5494 Oct 2 12:57 file1

• Open and read the content of the file
• Open, read, and edit the content of the file
• Execute the file
• Nothing

Answer 10

Open and read the content of the file

Open, read, and edit the content of the file

Question 11

When applied to a directory, the SGID special permission____________________.

• causes all new files created in the directory to have the same group
• membership as the directory and not the entity that created them.
• cannot be used, because it is applied only to files.
• allows users the ability to use more than two groups for files that they create within the directory.
• causes users to have their permissions checked before they are allowed to access files in the directory.

Answer 11

causes all new files created in the directory to have the same group

membership as the directory and not the entity that created them

Question 12

You noticed a file in your home directory that has a + symbol appended to the mode. What does this indicate?

• Special permissions have been set on the file.
• The file has one or more files on the filesystem that are hard linked to it.
• The sticky bit directory permission has been set on the file, and will remain inactive as a result.
• Additional entries exist within the ACL of the file that can be viewed using the getfacl command.

Answer 12

Additional entries exist within the ACL of the file that can be viewed using the getfacl command.

Question 13

Which of the following commands will change the user ownership and group ownership of file1 to user1 and root, respectively?

• chown user1:root file1
• chown user1 : root file1
• This cannot be done because user and group ownership properties of a file must be modified separately.
• chown root:user1 file1
• chown root : user1 file1

Answer 13

chown user1:root file1

Question 14

When you change the data in a file that is hard-linked to three others, __________.

• only the data in the file you modified is affected
• only the data in the file you modified and any hard linked files in the same directory are affected
• the data in the file you modified and the data in all hard linked files are modified because they have different inodes
• the data in the file you modified as well as the data in all hard-linked files are modified because they share the same data and all have the same inode and file size

Answer 14

the data in the file you modified as well as the data in all hard-linked files are modified because they share the same data and all have the same inode and file size

Question 15

Which command do you use to rename files and directories?

• cp
• mv
• rn
• rename

Answer 15

mv

Question 16

What are the three standard Linux permissions?

• full control, read-execute, write
• read, write, modify
• execute, read, write
• read, write, examine

Answer 16

execute, read, write

Question 17

After typing the command umask 731, the permissions on all subsequently created files and directories will be effected. In this case, what will be the permissions on all new files?

• rw-rw-rw-
• rwxrw-r–
• —r–rw-
• —-wx–x

Answer 17

—r–rw-

Question 18

The default permissions given by the system prior to analyzing the umask are ___________for directories and __________ for files.

• rw-rw-rw- and rw-rw-rw-
• rw-rw-rw- and r–r–r–
• rw-rw-rw- and rwxrwxrwx
• rwxrwxrwx and rw-rw-rw-
• rwxrw-rw- and rwx-rw-rw-

Answer 18

rwxrwxrwx and rw-rw-rw-

Question 19

What must a user do to run cp or mv interactively and be asked whether to overwrite an existing file? (mark all that apply)

• There is no choice as the new file will overwrite the old one by default.
• Type interactive cp or interactive mv.
• Type cp -i or mv -i.
• Type cp –interactive or mv - interactive.
• Just type cp or mv as they run in interactive mode by default.

Answer 19

Type cp -i or mv -i.

Question 20

Given the following output from the ls command, how many other files are linked with file1?

drwxr-xr-x 3 root root 4096 Apr 8 07:12 Desktop

• rw-r–r– 3 root root 282 Apr 29 22:06 file1
• rw-r–r– 1 root root 282 Apr 29 22:06 file2
• rw-r–r– 4 root root 282 Apr 29 22:06 file3
• rw-r–r– 2 root root 282 Apr 29 22:06 file4
• rw-r–r– 1 root root 282 Apr 29 22:06 file5
• rw-r–r– 1 user1 sys 282 Apr 29 22:06 file6

Answer 20

two