CHAPTER 8: EXPLORING THE UNIX/LINUX UTILITIES
TRUE/FALSE
1. Most computers store text using EBCDIC codes.
2. One of the most effective utilities for auditing system performance is the top command.
3. The top utility continues to produce output until you press x to terminate the execution of the program.
4. Unlike top, the free utility runs and then automatically exits.
5. When you use restore, by default it copies back to your current working directory.
6. An IP address uses a dotted decimal notation that consists of 16-bit binary numbers (octets) separated
by periods used to identify a computer or network device and the network it is on.
MULTIPLE CHOICE
1. The ____ utility manages a firewall and packet filtering.
a.
iptables
c.
passwd
b.
netstat
d.
wall
2. The ____ utility maintains program source code.
a.
make
c.
gcc
b.
patch
d.
configure
3. The ____ utility manages concurrent access to files in a hierarchy.
a.
tree
c.
rcs
b.
rlog
d.
cvs
4. The ____ utility schedules a command to run at a preset time.
a.
batch
c.
call
b.
crontab
d.
at
5. Possessing a rich set of options that allow it to handle copies when other methods are inappropriate,
the ____ command can handle conversions to and from legacy EBCDIC to ASCII.
a.
tee
c.
dd
b.
convert
d.
df
6. The df utility reports the number of ____-byte blocks that are allocated, used, and available; the
percentage used; and the mount point—for mounted file systems.
a.
512
c.
2048
b.
1024
d.
4096
7. When you use the du utility, file usage is expressed in the number of ____-byte blocks (default) or by
the number of bytes (the -b option).
a.
512
c.
2048
b.
1024
d.
4096
8. ____ is the default file name for the output of program compilation procedures.
a.
out.a
c.
a.out
b.
obj.a
d.
a.obj
9. The ____ command displays a listing of the most CPU-intensive tasks, such as the processor state, in
real time (the display is updated every five seconds by default).
a.
stat
c.
top
b.
netstat
d.
ds
10. The ____ command displays the amount of free and used memory in the system.
a.
mem
c.
memstat
b.
stat
d.
free
11. To run a program in the background, append the ____ character to the end of the command used to
start the program.
a.
&
c.
$
b.
*
d.
@
12. The ____ option of the ispell utility is used to ignore concatenated words.
a.
-c
c.
-i
b.
-C
d.
-I
13. You can use the ____ utility to compare the contents of two files, and if there is a difference, the
command reports the location at which the files first start to differ.
a.
cmp
c.
diff
b.
compare
d.
difference
14. dump level ____ is used to back up all files.
a.
0
c.
9
b.
1
d.
10
15. The ____ utility offers a simple way to test connections.
a.
ifconfig
c.
netstat
b.
test
d.
ping
16. The ____ option of the ping command displays only a summary of the results.
a.
-s
c.
-c
b.
-r
d.
-q
17. One use of ____ is to get a general idea of how efficiently your network is designed.
a.
ping
c.
traceroute
b.
netstat
d.
ifconfig
18. The ____ utility gathers statistics and information about IP communications on a computer.
a.
ping
c.
traceroute
b.
netstat
d.
ifconfig
19. A(n) ____ enables services and software on one computer to use services and software on a different
computer.
a.
NFS
c.
Samba
b.
RPC
d.
SMB
20. To start a service, you can use the ____ command from the root account.
a.
service
c.
stat
b.
start
d.
exec
21. UNIX/Linux computers can access shared Windows system drives through the use of ____.
a.
RPC
c.
IP
b.
NFS
d.
Samba
22. Samba is a utility that uses the ____ protocol, which is also used by Windows systems for sharing
folders and printers.
a.
RPC
c.
IP
b.
NFS
d.
SMB
COMPLETION
1. The ____________________ utility configures program source code automatically.
2. While running, the top command supports interactive commands such as ____________________,
which kills a running process.
3. Linux provides ____________________, which implements the features of both nroff and troff.
4. When you need to back up lots of files and directories or you want to do a full system backup, you can
use the ____________________ utility from the command line.
5. IP stands for ____________________.
6. When a client mounts an NFS volume from a host, both the client and host use
____________________ (RPCs).
MATCHING
Match each item with a statement below.
a.
df
f.
dump
b.
ifconfig
g.
du
c.
dd
h.
cmp
d.
groff
i.
talk
e.
ps
1. copies and converts input records
2. backs up files
3. compares two files
4. processes embedded text formatting codes
5. displays the amount of free space remaining on disk
6. summarizes file space usage
7. displays process status by process identification number and name
8. sets up a network interface
9. lets users simultaneously type messages to each other
SHORT ANSWER
1. What is a firewall?
2. When would you use dd instead of cp?
3. What happens if you use du without options?
4. What are garbage files?
5. What is a core file?
6. How can you use remove garbage files from your system?
7. What is the uptime command used for?
8. What is a PID?
9. What happens when you use the ps command with no options?
10. What is the traceroute utility used for?
11. What is NFS?