CHAPTER 1: THE ESSENCE OF UNIX AND LINUX
TRUE/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
1. 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
2. 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
3. ____ is an Internet terminal emulation program.
a.
IP
c.
Telnet
b.
Emulab
d.
Terminal
4. 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
5. Stephen Bourne at AT&T Bell Labs developed the ____ shell as the first UNIX command processor.
a.
Bash
c.
C
b.
Bourne
d.
Korn
6. Linux uses the freeware ____ shell as its default command interpreter.
a.
Bash
c.
C
b.
Bourne
d.
Korn
7. The UNIX/Linux ____ command displays the system date, which the system administrator maintains.
a.
today
c.
system
b.
sysdate
d.
date
8. You can use the ____ command to show the system calendar.
a.
clndr
c.
cal
b.
syscal
d.
calendar
9. To determine information about who is logged in, you can use the ____ command.
a.
whatis
c.
whois
b.
who
d.
whoami
10. 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
11. 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
12. 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
13. 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
14. 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
15. 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 (-)
16. 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
17. The ____ is the prompt symbol traditionally associated with ordinary users.
a.
dollar sign ($)
c.
tilde (~)
b.
pound sign (#)
d.
percent sign (%)
18. Fedora, Red Hat Enterprise Linux, SUSE, and Knoppix, recognize up to ____ characters in your user
name.
a.
8
c.
32
b.
16
d.
64
19. A ____ is used to refer to the user’s home directory.
a.
dot (.)
c.
forward slash (/)
b.
dollar sign ($)
d.
tilde (~)
20. 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
21. 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
22. To append output to an existing file, you use ____.
a.
>
c.
<
b.
>>
d.
<<
COMPLETION
1. A(n) ____________________ computer system, or PC, is usually a stand-alone machine, such as a
desktop or laptop computer.
2. UNIX/Linux are ____________________ operating systems, which means that these systems can be
used in a variety of computing environments.
3. ____________________ (FTP) is an Internet protocol used for sending files.
4. A(n) ____________________ address is a set of four numbers (in the commonly used version 4)
separated by periods, such as 172.16.1.61.
5. ____________________ (SSH) was developed for UNIX/Linux systems to provide authentication
security for TCP/IP applications, such as FTP and Telnet.
6. 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
f.
host
b.
network
g.
server
c.
shell
h.
root
d.
mainframe
i.
kernel
e.
domain
1. combines the convenience and familiarity of the personal computer with the ability to share files and
other computer resources
2. provides multiuser access to network resources
3. large computer that has historically offered extensive processing, mass storage, and client access for
industrial-strength computing
4. another name for server
5. device that has a monitor and keyboard, but no CPU
6. interface between the user and the operating system
7. base operating system
8. name that identifies a grouping of computer resources on a network
9. account that has complete access to a UNIX/Linux system
SHORT ANSWER
1. What is a peer-to–peer network?
2. 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.
3. Describe the most common methods used to connect to or access a UNIX/Linux system.
4. List the general steps used to access a UNIX/Linux host via Telnet.
5. What is the date command used for?
6. What is the who command used for? Why is this command important in a multiuser system?
7. What is the man program? What argument(s) does it accept?
8. Define command line history and describe its usage.
9. What is the cat command and how is it used?
10. What is output redirection? How is it performed in UNIX/Linux?