| Exam Code | XK0-004 |
| Exam Name | CompTIA Linux+ Certification Exam |
| Questions | 483 Questions Answers With Explanation |
| Update Date | June 05,2024 |
| Price |
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A 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
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
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
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
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
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
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
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
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
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
Which of the following are classified as Linux GUI servers? (Choose two.)
A. VNC
B. KDE
C. Gnome
D. Wayland
E. MATE
F. X11
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
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
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
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
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.
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
In which of the following directories is the vmlinuz file located?
A. /boot
B. /etc
C. /bin
D. /proc
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
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
