Download Guide-to-UNIX-Using-Linux-4th-Edition-Michael-Palmer-Test-Bank

Ch2
True/False
Indicate whether the statement is true or false.
____
1. In a peer-to-peer network, the system administrator secures all the information on the network by securing
the server.
____
2. You can switch from one shell to another by typing the shell’s name on the command line.
____
3. UNIX/Linux are not case sensitive.
____
4. The clear command has no options or arguments.
____
5. Most shells keep a list of your recently used commands and allow you to recall a command without retyping
it.
____
6. The system administrator’s prompt is the $ (dollar sign).
____
7. The less command scrolls only down, whereas more enables you to scroll down and up.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
8. UNIX/Linux are ____ systems, which let many people simultaneously access and share the resources of a
server computer.
a. superuser
c. multitasking
b. peer-to-peer
d. multiuser
____
9. UNIX and Linux are ____ systems, which allow one user to execute more than one program at a time.
a. server-based
c. multitasking
b. peer-to-peer
d. multiuser
____ 10. ____ is an Internet terminal emulation program.
a. IP
c. Telnet
b. Emulab
d. Terminal
____ 11. Currently, the ____ project, a joint effort of experts from industry, academia, and government, is working to
standardize UNIX.
a. POSIX
c. ANSI
b. BSD
d. Ubuntu
____ 12. Stephen Bourne at AT&T Bell Labs developed the ____ shell as the first UNIX command processor.
a. Bash
c. C
b. Bourne
d. Korn
____ 13. Linux uses the freeware ____ shell as its default command interpreter.
a. Bash
c. C
b. Bourne
d. Korn
____ 14. The UNIX/Linux ____ command displays the system date, which the system administrator maintains.
a. today
c. system
b. sysdate
d. date
____ 15. You can use the ____ command to show the system calendar.
a. clndr
c. cal
b. syscal
d. calendar
____ 16. To determine information about who is logged in, you can use the ____ command.
a. whatis
c. whois
b. who
d. whoami
____ 17. In the Linux Bash shell, the ____ key combination moves the cursor to the previous letter.
a. Ctrl+b
c. Alt+l
b. Alt+d
d. Ctrl+a
____ 18. In the Linux Bash shell, the ____ key combination deletes the content of the command line from the current
cursor position to the end of the command line.
a. Ctrl+b
c. Ctrl+k
b. Alt+d
d. Ctrl+a
____ 19. In the Linux Bash shell, the ____ key combination moves the cursor to the position just before the first
character of the next word.
a. Alt+l
c. Ctrl+k
b. Alt+d
d. Ctrl+a
____ 20. In the Linux Bash shell, the ____ key combination deletes a word or consecutive characters.
a. Ctrl+b
c. Alt+l
b. Alt+d
d. Ctrl+a
____ 21. In the Linux Bash shell, the ____ key combination moves the cursor to the beginning of the command line.
a. Ctrl+b
c. Alt+l
b. Alt+d
d. Ctrl+a
____ 22. You can type more than one command on the command line by separating commands with a ____.
a. vertical bar (|)
c. semicolon (;)
b. colon (:)
d. dash (-)
____ 23. To log out of UNIX/Linux (Bourne, Korn, or Bash shells) you can enter exit on the command line or press
____.
a. Ctrl+l
c. Ctrl+x
b. Ctrl+g
d. Ctrl+d
____ 24. The ____ is the prompt symbol traditionally associated with ordinary users.
a. dollar sign ($)
c. tilde (~)
b. pound sign (#)
d. percent sign (%)
____ 25. Fedora, Red Hat Enterprise Linux, SUSE, and Knoppix, recognize up to ____ characters in your user name.
a. 8
c. 32
b. 16
d. 64
____ 26. A ____ is used to refer to the user’s home directory.
a. dot (.)
c. forward slash (/)
b. dollar sign ($)
d. tilde (~)
____ 27. You can change your password, if necessary, by using the ____ command, but you must know your current
password to change it.
a. pwd
c. passwd
b. chpwd
d. password
____ 28. The head and tail commands, allow you to view the first few or last few lines of a file (____ lines by
default).
a. five
c. fifteen
b. ten
d. twenty
____ 29. To append output to an existing file, you use ____.
a. >
c. <
b. >>
d. <<
Completion
Complete each statement.
30. A(n) ____________________ computer system, or PC, is usually a stand-alone machine, such as a desktop
or laptop computer.
31. UNIX/Linux are ____________________ operating systems, which means that these systems can be used
in a variety of computing environments.
32. ____________________ (FTP) is an Internet protocol used for sending files.
33. A(n) ____________________ address is a set of four numbers (in the commonly used version 4) separated
by periods, such as 172.16.1.61.
34. ____________________ (SSH) was developed for UNIX/Linux systems to provide authentication security
for TCP/IP applications, such as FTP and Telnet.
35. The system administrator is also called the ____________________, because the system administrator has
unlimited permission to alter the system.
Matching
Match each item with a statement below.
a. terminal
b. network
c. shell
d. mainframe
e. domain
f.
g.
h.
i.
host
server
root
kernel
____ 36. combines the convenience and familiarity of the personal computer with the ability to share files and other
computer resources
____ 37. provides multiuser access to network resources
____ 38. large computer that has historically offered extensive processing, mass storage, and client access for
industrial-strength computing
____ 39. another name for server
____ 40. device that has a monitor and keyboard, but no CPU
____ 41. interface between the user and the operating system
____ 42. base operating system
____ 43. name that identifies a grouping of computer resources on a network
____ 44. account that has complete access to a UNIX/Linux system
Short Answer
45. What is a peer-to-peer network?
46. The concept of layered components that make up an operating system also originated with UNIX. Briefly
describe this concept as it applies to UNIX/Linux systems.
47. Describe the most common methods used to connect to or access a UNIX/Linux system.
48. List the general steps used to access a UNIX/Linux host via Telnet.
49. What is the date command used for?
50. What is the who command used for? Why is this command important in a multiuser system?
51. What is the man program? What argument(s) does it accept?
52. Define command line history and describe its usage.
53. What is the cat command and how is it used?
54. What is output redirection? How is it performed in UNIX/Linux?
Ch2
Answer Section
TRUE/FALSE
1.
2.
3.
4.
5.
6.
7.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
F
T
F
T
T
F
F
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1
1
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1
1
1
1
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4
9 | 10
14
18
23
24
26
PTS:
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1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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1
1
1
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MULTIPLE CHOICE
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
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ANS:
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D
C
C
A
B
A
D
C
B
A
C
A
B
D
C
D
A
C
D
C
B
B
COMPLETION
30. ANS: personal
PTS: 1
31. ANS: portable
REF: 2
PTS: 1
REF: 5
32. ANS: File Transfer Protocol
PTS: 1
REF: 5
33. ANS:
IP
IP (Internet Protocol)
Internet Protocol
Internet Procotol (IP)
PTS: 1
REF: 11
34. ANS: Secure Shell
PTS: 1
35. ANS: superuser
PTS: 1
REF: 12
REF: 24
MATCHING
36.
37.
38.
39.
40.
41.
42.
43.
44.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
B
G
D
F
A
C
I
E
H
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
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PTS:
PTS:
1
1
1
1
1
1
1
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1
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3
3
3|4
3
5
6
6
11
24
SHORT ANSWER
45. ANS:
Peer-to-peer networks,which are often used on small networks, are more distributed than server-based
networks. In a peer-to-peer configuration, each system on the network is both a server and a client. There is
no central server to manage user accounts; instead, each peer offers its own shared resources and controls
access to those resources, such as through a workgroup of designated members or through accounts created
on that peer workstation. Data and applications reside on the individual systems in the network. Software
upgrades and backup operations must be performed locally at each computer. Security, which is
implemented on each computer, is not uniform. Each user of the network is, to some degree, responsible for
administering his or her own system. Despite the disadvantages a peer-to-peer network presents to the
system administrator, the individual users do not depend on a central server. If one computer in the network
fails, the other systems continue to operate.
PTS: 1
46. ANS:
REF: 4
The concept of layered components that make up an operating system also originated with UNIX. Layers of
software surround the computer system’s inner core to protect its vital hardware and software components
and to manage the core system and its users. The layers of a UNIX system form a pyramid structure.
At the bottom of the pyramid is the hardware. At the top are the users. The layers between them provide
insulation, ensuring system security and user privacy. The kernel is the base operating system, and it
interacts directly with the hardware, software services, application programs, and user-created scripts
(which are files containing commands to execute). It is accessible only through Kernel mode, which is
reserved for the system administrator. This prevents unauthorized commands from invading basic operating
system code and hardware, resulting in actions that might hang or disrupt smooth operating system
functions. User mode provides access to higher layers where all application software resides.
This layered approach, and all other UNIX features,were designed by programmers for use in complex
software development.
PTS: 1
REF: 6
47. ANS:
Some of the common ways to connect or to access a UNIX/Linux system are:
- Through a Telnet or SSH connection to a remote computer, such as from another UNIX/Linux or a
Windows-based operating system (Not all versions of Windows implement SSH, but you can obtain SSH
from a third-party source, such as SSH Communications Security at www.ssh.com.)
- Through client software on a UNIX/Linux client/server network
- As a peer on a peer-to-peer, local area network in which each computer has the UNIX/Linux operating
system installed
- On a stand-alone PC that has the UNIX/Linux operating system installed
- Through a dumb terminal connected to a communications port on a UNIX/Linux host
PTS: 1
REF: 10 | 11
48. ANS:
The general steps used to access a UNIX/Linux host via Telnet are:
1. Determine the remote host’s IP address or domain name.
2. Connect to your network or the Internet.
3. Start your Telnet program, and connect to the UNIX/Linux system.
4. Follow the instructions in your Telnet program to connect to a remote host. For example, telnet
lunar.campus.edu
5. Provide a user name and password to log in to the remote UNIX/Linux computer.
PTS: 1
REF: 12
49. ANS:
The UNIX/Linux date command displays the system date, which the system administrator maintains.
Because the date and time on a multiuser system are critical for applications, only the system administrator
can change the date. For example, the Accounting Department might need to associate a date with a specific
file used for reporting tax information, or the Publications Department might have to date stamp a document
to ensure a specific copyright date.
The date command has an option,-u,which displays the time in Greenwich Mean Time (GMT).
PTS: 1
50. ANS:
REF: 15 | 16
To determine information about who is logged in, use the who command. In a multiuser system, knowing
who is logged in to the system is important for the administrator, so the administrator can periodically verify
authorized users and levels of use. Knowing who is logged in is also valuable for ordinary users,who can use
that information to judge how busy the system is at a given time or who might want to contact another user.
PTS: 1
REF: 18
51. ANS:
For reference, UNIX/Linux include an online manual that contains all commands, including their options
and arguments. The man program in UNIX/Linux displays this online manual, called the man pages, for
command-line assistance.
The man program usually accepts only one argument—the name of the command about which you want
more information. The online manual shows the valid command formats that your system accepts.
PTS: 1
REF: 18 | 19
52. ANS:
Often, you find yourself entering the same command several times within a short period of time. Most shells
keep a list of your recently used commands and allow you to recall a command without retyping it. You can
access the command history with the up and down arrow keys. Pressing the up arrow key once recalls the
most recently used command. Pressing the up arrow key twice recalls the second most recently used
command. Each time you press the up arrow key, you recall an older command. Each time you press the
down arrow key, you scroll forward in the command history. When you locate the command you want to
execute, press Enter. This capability can save time and frustration when you need to enter the same or
similar commands in one session.
PTS: 1
REF: 23
53. ANS:
The cat command gets its name from the word “concatenate”, which means “to link”. You can display
multiple files by entering their file names after the cat command and separating them with spaces.
UNIX/Linux then display the files’ contents in the order in which you entered them.
PTS: 1
REF: 26
54. ANS:
In UNIX/Linux, the greater-than sign (>) is called an output redirection operator. You can use this
redirection operator to create a new file or overwrite an existing file by attaching it to a command that
produces output. In effect, you redirect the output to a disk file instead of to the monitor. For example, if you
type who > current_users and press Enter, this creates a file called current_users that contains the
information from the who command.
Redirecting output is useful in many circumstances. For example, when you monitor a system, you might
redirect output to a file that you can examine later. Or, you might have a program or report-generating utility
that manipulates data so that you can redirect the results to a file instead of to the screen. You learn about
other redirection operators later in this book, but, for now, the > operator is a good starting point.
PTS: 1
REF: 26