37054907
Descrição
Quiz por Carlos Alberto Jara Alva, atualizado more than 1 year ago
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Criado por Carlos Alberto Jara Alva
aproximadamente 2 anos atrás
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Questão 1
Questão
What kind of hardware is represented by the device name /dev/hda?
Responda
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IDE Hard Drive
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SCSI Hard Drive
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SATA Hard Drive
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Sound Card
Questão 2
Questão
What file should you query to determine whether there is an IRQ conflict on your system?
Responda
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/proc/interrupts
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/proc/cpuinfo
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/proc/meminfo
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/proc/irqstatus
Questão 3
Questão
Which of the following are arguments you can pass to the kernel at boot time
to tell it to start in runlevel 1 (single-user mode)? (Select two)
Responda
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1
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single
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user
-
one
Questão 4
Questão
Which process is referred to as the “mother of all processes” and always has PID 1?
Responda
-
init
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mother
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admin
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administrator
Questão 5
Questão
Which logfile should you examine for information about the hardware that the kernel initialized at boot time?
Responda
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/var/log/messages
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/var/log/lastlog
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/var/log/wtmp
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/var/log/cron
Questão 6
Questão
If you want to change your system’s default boot device from the hard drive to the CD-ROM drive, where would you make that configuration change?
Responda
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The BIOS
-
The file /boot/grub/grub.conf
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The file /etc/inittab
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The file /etcgrub/grub.conf
Questão 7
Questão
What command line would reboot a running Linux system immediately, forcing an fsck of every drive on reboot?
Responda
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/sbin/shutdown –r –F now
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/sbin/shutdown –h –F now
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/sbin/shutdown
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/sbin/shutdown –r –f now
Questão 8
Questão
Which of the following are valid ways to interactively switch a running system to runlevel 3? (Select two)
Responda
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init 3
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telinit 3
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runlevel 3
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init -3
Questão 9
Questão
If you have created your own script that you wish to run every time your system boots, but it must run after all other processes have completed, where is the best place to reference it?
Responda
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/etc/inittab
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/etc/rc.d/rc.sysinit
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A symlink beginning with S in /etc/rc.d/rc5.d/
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/etc/rc.d/rc.local
Questão 10
Questão
Which command is used to display the current mounted partitions, their mount points, and the available free space on each?
Responda
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df
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fdisk
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fsck
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mount
Questão 11
Questão
Which partition is designed to hold data that changes often and is writable by all users?
Responda
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/tmp
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/opt
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/sys
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/var
Questão 12
Questão
What does MBR stand for?
Responda
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Master Boot Record
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Main Booting Runlevel
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Main Block Record
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Master Boot Resource
Questão 13
Questão
Which of the following lines in /boot/grub/grub.conf would tell GRUB to use the first partition of the first hard drive as the root partition?
Responda
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root (hd0,0)
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boot (hd0,0)
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root (hd1,1)
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boot (hd1,1)
Questão 14
Questão
What file contains a list of directories that are searched to find shared libraries when a binary program is executed?
Responda
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/etc/ld.so.conf
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/etc/loader.conf
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/etc/library/conf
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/etc/ld.so.cache
Questão 15
Questão
For distributions that use the Debian package management system, what command will download and update all installed packages to the latest available version?
Responda
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apt-get update
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apt-get install
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apt-cache update
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dpkg –i
Questão 16
Questão
If I download a .deb package (package.deb) and wish to install it, what’s the best command to use?
Responda
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dpkg –i package.deb
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apt-get install package.deb
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apt install package.deb
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dpkg package.deb
Questão 17
Questão
For distributions that use the Red Hat package management system, what command will list all packages currently installed?
Responda
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rpm –qa
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rpm –i
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rpm –Uvh
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rpm –list
Questão 18
Questão
For distributions that use the Red Hat package management system, what command will download and update all installed packages to the latest available version?
Responda
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yum update
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yum install
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yum config
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yum list available
Questão 19
Questão
What option(s) to rpm will instruct rpm to run a verification check on all packages installed on the system? (Select two)
Responda
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rpm –verify –all
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rpm –Va
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rpm –qa
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rpm –check
Questão 20
Questão
What command is used to display a list of directories the shell will search in to find a command that has been entered?
Responda
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echo $PATH
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echo $MYPATH
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setenv
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set $PATH
Questão 21
Questão
Which file(s) does the bash shell read at login to set environment variables?
Responda
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All of the above
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/etc/bashrc
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~/.bashrc
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None of the above
Questão 22
Questão
What commands can be used to view a list of the last commands typed into the shell?
Responda
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All of the above
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history
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<Ctrl-R>
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<up arrow>
Questão 23
Questão
If my current directory is /opt and I wish to run the command /opt/runme, what
command(s) could I type (assuming /opt is not in your $PATH)? (select two)
Responda
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/opt/runme
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/runme
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opt/runme
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~/runme
Questão 24
Questão
Which of the following commands will redirect the standard output of /bin/ls to /dev/null, while allowing standard error to display on the screen?
Responda
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/bin/ls 1> /dev/null
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/bin/ls > /dev/null
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/bin/ls > /dev/null 2>&1
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/bin/ls 2> /dev/null 1>&2
Questão 25
Questão
Which of the following command(s) will display the first 5 lines of the file /etc/passwd? (Select two)
Responda
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head -5 /etc/passwd
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cat /etc/passwd | head -5
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cat -5 /etc/passwd
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cat /etc/passwd | more -5
Questão 26
Questão
Which commands can be used to perform a search and replace on a file or a text stream? (Select two)
Responda
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sed
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tr
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dd
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mv
Questão 27
Questão
What command(s) can be used to copy data to and from raw devices, bypassing the filesystem? (Select two)
Responda
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tar
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dd
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mv
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sed
Questão 28
Questão
What option can be passed to /bin/ls to display every file in a directory that ends in .txt?
Responda
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ls * txt
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ls *txt*
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ls [txt]
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ls +.txt
Questão 29
Questão
What option can be passed to /bin/ls to display every file that starts with the letters a, b, or c?
Responda
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ls [abc]*
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ls abc*
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ls a*b*c*
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ls ^abc
Questão 30
Questão
Which file extensions are common for files or directories that have been concatenated with tar and then compressed with bzip2?
Responda
-
All of the above
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.tar.bz2
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.tbz2
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.tbz
Questão 31
Questão
What device should you redirect output to if you do not want to see it or save it?
Responda
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/dev/null
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/dev/nothing
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/dev/empty
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/dev/zero
Questão 32
Questão
Which of the following commands would list the contents of the directory /tmp, store that list in the file /root/tmp.txt, and display the list a screen at a time?
Responda
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ls –l /tmp | tee /root/tmp.txt | more
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ls –l /tmp | xargs /root/tmp.txt | more
-
ls –l /tmp | more | tee /root/tmp.txt
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tee /root/tmp.txt | ls –l /tmp | more
Questão 33
Questão
What character is used after a command line to indicate that the command should run in the background and return shell control to the user?
Responda
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&
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*
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+
-
-
Questão 34
Questão
What command is used at the beginning of a command line to detach the process from a terminal, allowing it to continue running after the user has logged out?
Responda
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nohup
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hangup
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detach
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background
Questão 35
Questão
What command will display a full-screen, updated list of all running processes?
Responda
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top
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kill
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ps
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free
Questão 36
Questão
If a running process is not responding to a standard terminate signal from the /bin/kill command, what option can you pass to force the process to terminate immediately?
Responda
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kill -9
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kill -1
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kill --HUP
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kill --stop
Questão 37
Questão
What command can be used to kill processes by name, rather than process ID?
Responda
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killall
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killproc
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killname
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kill –name
Questão 38
Questão
Which command line would start the program /usr/bin/top with the highest priority possible?
Responda
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nice --20 /usr/bin/top
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nice 20 /usr/bin/top
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nice 19 /usr/bin/top
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nice -20 /usr/bin/top
Questão 39
Questão
Which command is used to modify the priority of a process already running?
Responda
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renice
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priority
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chage
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ps
Questão 40
Questão
Which command(s) would display every line in /tmp/file.txt that begins with the letter h and ends with the letter t?
Responda
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grep –E "^h.*t$" /tmp/file.txt
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grep "^h.+t$" /tmp/file.txt
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grep –E "^h.+t$" /tmp/file.txt
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grep –E "$h.+t^" /tmp/file.txt
Questão 41
Questão
Which command(s) would display every line in /tmp/file.txt that contains at least one letter of the alphabet? (Select Two)
Responda
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grep " [a-zA-Z] " /tmp/file.txt
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grep " [:alpha:] " /tmp/file.txt
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grep " [:letters:] " /tmp/file.txt
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grep " (a-zA-Z) " /tmp/file.txt
Questão 42
Questão
In the vi editor, what command sequence given in command mode will save the current file and quit the editor?
Responda
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:wq
-
:WQ
-
:pq
-
None of the above
Questão 43
Questão
In the vi editor, what command sequence given in command mode will make a copy of the current line?
Responda
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yyp
-
cp
-
yp
-
ccp
Questão 44
Questão
In the vi editor, what command sequence given in command mode will quit a file without saving, even if changes have been made?
Responda
-
:q!
-
:q
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:q1
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:w!
Questão 45
Questão
Which of the following are examples of journaling filesystems? (Select two)
Responda
-
ext3
-
reiserfs
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xfs
-
ext2
Questão 46
Questão
What command will create an ext3 partition on the first partition of the first SCSI hard drive?
Responda
-
mkfs –t ext3 /dev/sda1
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fdisk –t ext3 /dev/sda1
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fsck –t ext3 /dev/sda1
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mkfs –s ext3 /dev/hda1
Questão 47
Questão
What command is used to convert an existing ext2 partition (/dev/sda1) to an ext3 (journaled) partition?
Responda
-
tune2fs –j /dev/sda1
-
dumpe2fs –j /dev/sda1
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fsck –j /dev/sda1
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mkfs.ext2 –j /dev/sda1
Questão 48
Questão
What command is used to display the number of free inodes on an ext2 or ext3 partition?
Responda
-
dumpe2fs
-
showe2fs
-
fsck
-
fdisk
Questão 49
Questão
Which file defines what partitions are mounted at boot time?
Responda
-
/etc/fstab
-
/etc/partitions
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/etc/mount
-
/etc/mtab
Questão 50
Questão
Which command will mount all partitions of type nfs defined in /etc/fstab?
Responda
-
mount –a –t nfs
-
mount –a nfs –t
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mount –nfs
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mountall –nfs
Questão 51
Questão
If you would like to give a normal (nonroot) user the ability to mount a device, what option should you define for that device in /etc/fstab?
Responda
-
user
-
mountable
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noroot
-
ok
Questão 52
Questão
Which option to chmod would assign read/write permission to the file owner, read-only permission to the group owner, and read-only permission to everyone else?
Responda
-
chmod 644 file.txt
-
chmod 755 file.txt
-
chmod 466 file.txt
-
chmod 777 file.txt
Questão 53
Questão
Which option to umask would set my default file permissions such that files are created with these permissions: user has read/write, group has read/write, and everyone else has read only?
Responda
-
umask 022
-
umask 200
-
umask 220
-
umask 775
Questão 54
Questão
Which command can be used to quickly tell you if an executable command is in any directory defined in your $PATH environment variable?
Responda
-
which
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find
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locate
-
who
Questão 55
Questão
Which directory, according to the Filesystem Hierarchy Standard, is designed to hold essential system binaries?
Responda
-
/sbin
-
/bin
-
/usr/bin
-
/opt/bin
Questão 56
Questão
According to the Filesystem Hierarchy Standard, what directory (or directories) must hold the system kernel? (Select Two)
Responda
-
/boot
-
/
-
/opt
-
/sbin
Questão 57
Questão
What command is used to maintain the filesystem index that the command /usr/bin/locate searches?
Responda
-
updatedb
-
update
-
updatelocate
-
locate –update
Questão 58
Questão
Use find to search for bash:
Responda
-
$ find / -name bash
-
$ find / -linux bash
-
$ find / -time bash
-
$ find / -chown bash
Questão 59
Questão
If you created a new partition in the previous exercises, check it with fsck and observe the output:
Responda
-
$ fsck -f /dev/partition
-
$ fsck -f /bin/partition
-
$ fsck -f /sbin/partition
-
$ fsck -f /dev/null
Questão 60
Questão
Check on the status of filesystems using df:
Responda
-
$ df -h
-
$ df -w
-
$ df -z
-
$ df -gg
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