QUESTION 7 There are manual pages for crontab in more than one section of the ma
ID: 3813524 • Letter: Q
Question
QUESTION 7
There are manual pages for crontab in more than one section of the manuals. How would you display the crontab manual in section 5?
man crontab 5
help crontab 5
man 5 crontab
more crontab --section 5
QUESTION 8
What are the three basic Unix file permission mode attributes?
a .r - remove
w - write
x - examine
b.r - read
w - write
x - execute
c.l - list
d - delete
u - update
d.v - view
w - write
x - delete
QUESTION 9
On a Red Hat system, which command would you type to find a packaged named emacs in the software repository?
rpm -s emacs
find -repo emacs
apt-get search emacs
yum search emacs
QUESTION 10
What is the difference between typing “yum install emacs” and “rpm -i emacs-22.1-7.fc7-i386.rpm”
Yum installs software so any user on the system can use it, while rpm installs for the current user only.
yum will download additional dependencies, while rpm won’t do any dependency resolution.
Both do the same thing, but rpm is faster.
rpm is only used in Red Hat systems, while yum is only used in Debian systems.
QUESTION 11
You want to do a global search and replace in vi. After opening the file in vi, which command would you type to search for all occurrences of the word Apple with Orange?
:gsar:Apple:Orange
:s/Apple%Orange/
:%s/Apple/Orange/g
:[Apple][Orange]g
QUESTION 12
What is the purpose of the following file? /etc/profile
A listing of a server’s main hardware and software specifications.
A global configuration script that applies to all user bash shell sessions.
This file configures the wireless card.
This file configures the software repositories for downloading new software.
QUESTION 13
Why might you send the command kill -1 to the process ID number of the apache web server instead of kill -9?
Because you should start at the lowest number first, and only raise the number if the prior number doesn’t work.
Kill -9 is only a “polite” request, and often doesn’t work.
kill -1 must be used when you are the root user.
Because you web server to restart and re-read its configuration file, not shut down.
QUESTION 14
What command would you issue to shutdown a Unix machine (assuming you are root)?
sd
shutdown -h now
logout -s
killall -s
QUESTION 15
Why is it important to unmount a storage device before removing it from a running Unix system?
Because it frees up drive letters (like D:, E:) for other storage devices.
It automatically notifies all users that their open files have been saved to disk.
It will make sure that any data writes that are in temporary memory buffers will be written to disk before removal.
d.Without unmounting, the device becomes read-only when used in other computers.
QUESTION 16
In Unix, what is the purpose of the fsck command?
It is used for file compression.
It is used to find available networking sockets.
It is used as a “fast kill” command to terminate all programs owned by a user.
It is used to check and repair filesystems.
QUESTION 17
Which command can you use to test a network connection to a remote host?
fsck
ping
ls -r
echo
QUESTION 18
Both ftp and scp can be used to copy file between hosts. Why might you use scp?
ftp only copies one file at a time, while scp can copy multiple files.
ftp can only be used text files, while scp can transfer any type of file like photos or programs.
scp uses the secure shell protocol to encrypt your connection, while ftp is less secure.
scp allows anonymous downloads, while ftp only allows uploads.
QUESTION 19
Which command would search the entire filesystem for directories with 777 permissions?
find -t dirs 777
locate -type d -p 777
find / -type d -perm 777
find * -d 777
QUESTION 20
Which command would place the files homework1.txt, homework2.txt, and homework3.txt into a single compressed archive named homework-archive.tgz?
rsync homework-archive.tgz homework1.txt homework2.txt homework3.txt
tar -czf homework-archive.tgz homework1.txt homework2.txt homework3.txt
tar -xzf homework-archive.tgz homework1.txt homework2.txt homework3.txt
tar homework1.txt homework2.txt homework3.txt -czf homework-archive.tgz
a.man crontab 5
b.help crontab 5
c.man 5 crontab
d.more crontab --section 5
Explanation / Answer
7)
Answer: c) man 5 crontab
8)
Answer: b). r - read w - write x - execute
9)
Answer: d) yum search emacs
10)
Answer: b) yum will download additional dependencies, while rpm won’t do any dependency resolution.
11)
Answer: c) %s/Apple/Orange/g
12)
Answer: b) A global configuration script that applies to all user bash shell sessions.
13)
Answer: d) Because you web server to restart and re-read its configuration file, not shut down.
14)
Answer: b) shutdown -h now
15)
Answer: c) It will make sure that any data writes that are in temporary memory buffers will be written to disk before removal.
16)
Answer: d) It is used to check and repair filesystems.
17)
Answer: b) ping
18)
Answer: c) scp uses the secure shell protocol to encrypt your connection, while ftp is less secure.
19)
Answer: c) find / -type d -perm 777
20)
Answer: b) tar -czf homework-archive.tgz homework1.txt homework2.txt homework3.txt
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