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CompTIA XK0-004 Exam Dumps
CompTIA Linux+ Certification Exam
Total Questions : 483
Update Date : May 10, 2024
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XK0-004 Exam Dumps
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CompTIA XK0-004 Sample Questions
Question # 1A systems administrator receives a report that the web server is not running after a planned system reboot.After starting the web server manually, which of the following commands should the administrator issue to ensure the web server starts at boot time?
A. systemctl service on
B. systemctl enable <name>.service
C. systemctl service enable
D. systemctl on <name>.service
Question # 2
A user wants to alias dir so it always returns the contents of the ls -la command. However, the user has to reset the alias with every login.Which of the following is the BEST action the user can take to ensure the command is always available?
A. echo "alias dir=ls -la" > /etc/profile
B. echo "alias dir=ls -la" >> /etc/skel
C. echo "alias dir=ls -la" >> ~/.profile
D. echo "alias dir=ls -la" > ~/.bashrc
Question # 3
An administrator needs to kill the oldest Bash shell running in the system. Which of the following commands should be issued to accomplish this task?
A. ps axjf | grep bash to obtain PID kill -9 PID
B. ps –eo pid,etime,cmd | grep bash (to obtain PID) kill -9 PID
C. ps –eo pid,etime| grep bash (to obtain PID) killall -9 PID
D. killall -15 -o bash
Question # 4
A Linux team is using Git to version a set of custom scripts. A team member has made an update to a script and published the changes to the repository.Which of the following is the BEST way to retrieve the latest changes to the administrator's local working copy?
A. git fetch
B. git merge
C. git commit
D. git pull
Question # 5
A junior systems administrator is scanning archive.tar files with an antivirus scanner. The administrator is given the following tasks: List all files that are in the archive.tar files.Extract all files from the archive.tar files.Which of the following actions should be performed to meet these requirements? (Choose two.)
A. tar -tvf archive.tar
B. tar -xf archive.tar
C. tar -A archive.tar
D. tar -av archive.tar
E. tar -r archive.tar
F. tar -uvz archive.tar
Question # 6
A Linux administrator needs to disable the Sendmail service on a Linux server and prevent it from being started manually and during boot.Which of the following is the BEST command to do this?
A. systemctl reset-failed sendmail
B. systemctl mask sendmail
C. systemctl stop sendmail
D. systemctl disable sendmail
Question # 7
A new IO card has been added to the security server to log the opening and closing of the main entrance. A switch is attached, so the interface card returns a 1 when the door is opened and a 0 when the door is closed.Which of the following describes the Linux device to which this switch is attached?
A. /dev/tty0
B. /dev/port
C. /dev/gpio
D. /dev/sg0
Question # 8
A user wants to use terminal services from a Windows workstation to manage a Linux server. Which of the following should be installed on the Linux server to enable this functionality?
A. VNC
B. rdesktop
C. SPICE
D. XRDP
Question # 9
A Linux administrator wants to configure log messages of critical or higher severity levels from the cron utility to be logged to the console. Which of the following will accomplish thisobjective?
A. Edit the /etc/logrotate.d/cron file to include the line cron.emerg.* /dev/console
B. Edit the /etc/rsyslog.conf file to include the line cron.emerg.* /dev/console
C. Edit the /etc/logrotate.conf file to include the line cron.emerg.* /dev/console
D. Edit the /etc/rsyslog.d/conf file to include the line cron.emerg.* /dev/console
Question # 10
A Linux administrator is restoring the SELinux contexts on an entire system. Which of the following commands is the BEST option to complete this task?
A. setenforce 0 && reboot
B. setfacl –bR / && reboot
C. touch /.autorelabel && reboot
D. restorecon / && reboot
Question # 11
Which of the following are classified as Linux GUI servers? (Choose two.)
A. VNC
B. KDE
C. Gnome
D. Wayland
E. MATE
F. X11
Question # 12
A new user has been added to a Linux machine. Which of the following directories would contain the user’s default files?
A. /etc/login.defs
B. /etc/passwd
C. /etc/skel
D. /etc/inittab
Question # 13
An issue was discovered on a testing branch of a Git repository. A file was inadvertently modified and needs to be reverted to the master branch version. Which of the following isthe BEST option to resolve the issue?
A. git branch -b master file
B. git merge master testing
C. git stash branch master
D. git checkout master -- file
Question # 14
Which of the following boot methods can a Linux administrator use to boot a Linux server remotely via a network interface card instead of a local disk?
A. NTP
B. PXE
C. NFS
D. Kickstart
Question # 15
A systems administrator manually added a new library to the server. The administrator wants to rebuild the library cache for immediate use.Which of the following commands should the systems administrator run to achieve this goal?
A. make install
B. ldconfig
C. make
D. ldd
Question # 16
A new video card was added to a customer workstation. To get the new video card to work correctly, a systems administrator needs to remove support for the nouveau video driver on the Linux workstation.Which of the following will accomplish this task?
A. Use rmmod -f nouveau.
B. Use modprobe -R nouveau.
C. Add blacklist nouveau to /etc/modprobe.d/blacklist.conf.
D. Add blacklist nouveau to /etc/modprobe.conf.
Question # 17
A user has been locked out of an account due to too many failed password attempts.Which of the following commands will unlock the user’s account?
A. pam_tally2 --user=user --reset
B. passwd -u user -G root
C. usermod -u user -G root
D. chage -1 user=user --reset
Question # 18
In which of the following directories is the vmlinuz file located?
A. /boot
B. /etc
C. /bin
D. /proc
Question # 19
A Linux administrator suspects unauthorized users are attempting to log in to the Linux server remotely. Which of the following should the administrator check FIRST?
A. /var/log/messages
B. /var/log/secure
C. /var/log/dmesg
D. /var/log/kern.log
Question # 20
An administrator needs a bootable USB for installing a new Linux machine. The administrator downloaded the image file and named it as Linux_OS.iso in the /tmp directory. Which of the following commands will accomplish that task?
A. dd input=/tmp/Linux_OS.iso of=/dev/sda bs=512
B. dd in=/tmp/Linux_OS.iso out=/dev/sdb bs=512
C. dd if=/tmp/Linux_OS.iso of=/dev/sda bs=512
D. dd if=/tmp/Linux_OS.iso out=/dev/sdb1 bs=512
Question # 21
A systems administrator is receiving errors while trying to install a popular virtualization software. The software specifications state the processor needs to support virtualization with Intel instructions. Additional requirements state the processor must accelerate encryption/decryption and use hyperthreading. Given the following output about the processor:fpu ume depse tsu msr pae mce cx8 apic sep mtrr pae mca cmov pat pse36 cflusm mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx rdrand hypervisor lahf_lm fsgsbaseWhich of the following is the MOST likely reason for the errors?
A. The processor supports AMD instructions rather than Intel.
B. The processor cannot accelerate decryption.
C. The processor does not support hyperthreading.
D. The processor is running inside a virtual machine.
Question # 22
Joe, a user, reports that he is no longer able to write files to his home directory. Upon inspection, the Linux administrator discovers that attempting to create a new file gives the following error: No space left on device. However, the disk and partition are not full. Which of the following commands would be BEST for the administrator to use to continue troubleshooting thisproblem?
A. rm -Rf ~/.*
B. fsck -y /dev/sda1
C. df -i
D. fdisk /dev/sda
Question # 23
A raw VM image is being compressed with bzip2 and copied to a flash drive at /dev/hdb for off-site use by the marketing department. Which of the following command lines accomplishes this task?
A. mv /vm/mkgt.img | bzip2 /dev/hdb/mkgt.img.bz2
B. bzip2 –c /vm/mktg.img | dd of=/dev/hdb
C. cp /vm/mktg.img | bzip2 /dev/hdb/mktg.img.bz2
D. cp –a –r /vm/mktg.img bzip2 /dev/hdb/mktg.img.zip
Question # 24
A Linux administrator tried to copy files to a remote server but received an error message indicating a lack of free space on the disk. The administrator issued a df command and verified adequate free space and inodes on the filesystem.Which of the following commands is the BEST way to diagnose the issue?
A. cat /proc/meminfo
B. lsof -nP | grep deleted
C. find / -type f -size +50M
D. du -a / | sort -n -r | head -n 30
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