Linux Quizzes #1-6

Which prompt does the root user receive when logged in to the system?

#

(1/2) Which of the following files will be executed immediately after a user logins in (with a password) to a Linux system and receives a BASH shell? Assume that all of these files exist and we adopt the current settings of Fedora distributions. (2/2) Which of the following files will be executed immediately after a user receives a BASH shell without login? Same assumptions as above?

(1/2) /etc/profile ~/.bash_profile ~/.bash_login ~/.bashrc (2/2) /etc/bashrc ~/.bashrc

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

--r--rw-

The command chmod 4256 file1 would product which of the following permissions?

--wSr-xrw-

The command chmod 317 file1 would produce which of the following permissions?

--wx--xrwx

The command chmod 7751 file1 would produce which of the following permissions?

-rwsr-s--t

Which of the two partitions do you typically create at minimum during a Red Hat Linux installation?

/ & /swap

Given the following configurations, which filesystems will be automatically checked on boot by the fsck command?

/, /proc, and swap

Which of the following is an absolute pathname in Linux?

/home/resume

Which of the following file descriptor numbers represents stdin?

0

Which of the following kernels are developmental kernels?

2.3.6, 2.5.5 are examples

What is the main purpose of the swap partition? How to determine it's size?

2x ram

How many primary partitions may a hard disk have?

4

What is the default shell in Red Hat Linux called?

BASH

Which of the following features are provided by a shell?

Batch processing (via shell scripts) Command history Job control Metacharacters

How do you indicate a comment line in a shell script?

Being the line with #

Which of the following statements are true about a hard link?

Creating a hard link does not require using a new inode Hard link cannot be linked to a file that is located on another partition Hard link cannot be linked to a folder

When sitting at a computer running Linux, what key combination is preset to open the graphical terminal?

Ctrl+Alt+F1 (maybe Ctrl+Alt+G)

A directory is NOT a type of file? T/F

False

Because Standard Error and Standard Output represent the results of a command and Standard Input represents the input required for a command, only Standard Error and Standard Output can be redirected to/from a file. T/F

False

Both PS1 and HOME are environmental variables because they always exist in the shell (or a subshell). T/F

False

Linux commands entreated via the command line are not case sensitive T/F

False

The less command offers less functionality than the more command. T/F

False

Which common GUI environments are available in most Linux distributions?

GNOME and KDE

To which license does Linux adhere?

GNU Public license

What does << accomplish when used at cat >file1 <<bye?

It indicates the end of inputs is bye

A proton can be referenced by which of the following manner in /etc/fstab?

Its name under the /dev folder Its UUID Its label

When the core components of the Linux operating system are packaged together with other Open Source Software, it is called a:

Linux distribution

Jim just purchased two new SCSI hard disk drives and a controller card for them. He properly installs the hardware in his machine. Before he can use them for data storage and retrieval, what must he do?

Mount any partitions created so accessible by OS Format any partitions created w/ valid filesystem (rec. by Linux) Use the fdisk command to create one or more partitions on each of the drives

How can you protect a meta character (such as the $ character) from shell interpretation?

Precede it with a \

Which of the following statements about quota are true?

Quotas can limit both user space and then number of files a user can own Hard limits can never be exceeded Soft limits allow a user to exceed them for a certain period of time

Consider the following shell script. What would be displayed if a user executes this program and answers Blue when prompted? echo -e "What is your favorite color?--> \c" if [ "$REPLY" = "red" -o "$REPLY" = "blue" ] then echo "The answer is red or blue." else echo "The answer is not red nor blue." fi

The answer is not red nor blue.

What is wrong with the following command string ls /etc/hosts >list file 2>list file?

The file list file may contain the results in an unexpected order

As the root user, you tried to delete a file. Yet, it was rejected. Why?

The file's attributes may have been modified by chattr to be non-removable

Linux has only one root (/) directory per directory tree. T/F

True

Which of the following can switch modes when using a vi editor?

Type in a (:), (?), or (/) character Press the Esc key Type in one of the following a, i, o, or r letters

A user mounts a device to a directory and realizes afterward there a files previously found within the mount point directory that are needed. What should this user do?

Unmount the device from the directory.

What must you do to successfully run the fsck command on a filesystem?

Unmount the filesystem

You would like to grant the red permission on a file (name my_file) to a regular user named Alex. The file's current permission and ownership information is listed below? What would be the most appropriate way to do it? [Instructor@ClassDemoFC-001 tmp]$ ll my_file -rw-rwxr--+ 1 root tmp 332183 Sep_29 10:15 my_file

Use sefacl to give rex permission to Alex these work whether appropriate or not -chmod 677 my_file Add Alex to the group name tmp Change the group owner to be Alex's group

After typing the ls -l command, you see the following line in the output: -rw-r-xr-- 1 user1 root 0Apr29 15:40 file1

User1 has read and write, Members of root group have read and execute, all others have read permissions to the file

What would be the effect of using the alias command to make an alias for the date command named cat in honor of your favorite pet?

When you use the cat command at the command prompt with the intention of viewing a text file, the date appears instead

Which of the following filesystems can be recognized by Linux?

XFS ext2 ext3 ext4

In vi, how to go to the first character on a given line

^ (check this) other possible answers (gg, G, $)

What are the two major purposes of MBR?

boot loader & partition table

You want to see the filesystems that are presently in use on the system. What command could you use?

cat /etc/mtab mount

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.

Is a user's current directory is /home/mary/project1, which command could she use to move to the etc directory directly under the root?

cd /etc

Which of the following commands can change the group ownership?

chgrp, chown

A file has the following permissions -r----x-w-. The command chmod 143 would have the same effect as the command ---.

chmod u=x, g=r, o=wx file1

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 user.root file1

Which command blanks the terminal screen erasing previously displayed output?

clear

The vi editor can function in which of the following modes?

command input VI

Which of the following commands create a symbolic link?

cp -s file s-file ln -s file s-file

Which command is used to display the amount of free space that exists on a filesystem?

df

The tac command ---.

displays the contents of a file in reverse order last line first and first line last

Which command can be used to show the value of variable in the shell?

echo

Which of the following command will return the PID (process ID) of the current bash?

echo $$

Before a user-defined variable can be used by processes than run in subshells, that variable must be ---.

exported

In vi how to go to the first line of a file?

gg

What commands can you use to safely shut down the Linux system immediately?

halt or shutdown -h now (ask, butinternet says halt)

After typing the ls -a command, you notice that there is a file whose filename beings with a dot ( . ). What does this mean?

it is a hidden file

You know a Linux command will perform a desired function for you, but you cannot remember the full name of the command. You do remember it will flush a variable from your system. Which command typed at a command prompt displays a list of commands that would likely contain the command you desire?

man -k flush

What equivalent to the man command generally provides and easier-to-read description of the queried command and also contains links to other related information?

man help (1 of these might be wrong) and/or info

Describe two different ways to obtain hardware information so as to prepare for a Linux installation.

manufacturers info & system info

Which command i used to format a partition on a hard disk rive?

mkfs -t type device

Which command mounts all existing filesystems listed in /etc/fstab?

mount -a

Linus is a --- and --- operating system?

multiuser, multitasking

What would be displayed if a user executed ls /etc/hello 2>/dev/null || echo "not exist" && echo "exist" ? Assume that there is no file named hello under /etc.

not exist

How many extended partitions may a hard disk have?

only 1

Explain one of the major problems of MBR?

only allows 4 partitions

Which command would a user type on the command line to find out what directory in the directory tree he is currently in?

pwd

What will typing q! at the : prompt in command mode do when using the vi editor?

quit without saving any changes

A special device file is used to ---?

represent hardware devices such as hard disk drives and ports

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

rwxrwxrwx and rw-rw-rw-

Which of the following refers to the third primary partition on the second SATA hard disk within Linux?

sdb3

Which command could you use to see a list of exported environment variables and user-defined shell variables as well as their current values?

set

After a user logs in to a terminal, he receives a user interface called a ---?

shell

What does the du -h /var command do?

shows the size of all directories within the /var directory

How to load a bash profile named .bashrc in the current working directory?

source .bashrc . .bashrc

Which command searches for and displays any text contents of a binary file?

strings

The core component of the Linux operating system is the Linux kernel if you were a Linux systems administrator for a company, when would you need to upgrade your Linux kernel?

when you need to have support in Linux for new hardware when you need to increase the stability of Linux when you need to have better system security

Which command displays the users who are currently logged into the linux system?

who & w