CompTIA Linux+ XK0-005 Study Guide Updated To Be Your Good Learning Materials

dumps2022-11-29T07:08:08+08:00

When coming to Itfreedumps for getting the valid learning materials to prepare for CompTIA Linux+ XK0-005 exam, you can trust the latest and updated XK0-005 study guide. The certified professionals and experts of Itfreedumps updated the XK0-005 study guide pdf with actual questions and answers. You only need to practice all these questions and answers regularly before actual test, we guarantee that you will have a chance to pass the CompTIA Linux+ Certification Exam. Below are the free XK0-005 demo questions for checking first.

Page 1 of 5

1. Which of the following tools is BEST suited to orchestrate a large number of containers across many different servers?

Kubernetes

Ansible

Podman

Terraform

2. A Linux administrator needs to correct the permissions of a log file on the server.

Which of the following commands should be used to set filename.log permissions to -rwxr―r--. ?

chmod 755 filename.log

chmod 640 filename.log

chmod 740 filename.log

chmod 744 filename.log

3. Users have been unable to reach www.comptia.org from a Linux server.

A systems administrator is troubleshooting the issue and does the following:

Based on the information above, which of the following is causing the issue?

The name www.comptia.org does not point to a valid IP address.

The server 192.168.168.53 is unreachable.

No default route is set on the server.

The network interface eth0 is disconnected.

4. A Linux administrator is troubleshooting SSH connection issues from one of the workstations.

When users attempt to log in from the workstation to a server with the IP address 104.21.75.76, they receive the following message:

The administrator reviews the information below:

Which of the following is causing the connectivity issue?

The workstation has the wrong IP settings.

The sshd service is disabled.

The server’s firewall is preventing connections from being made.

The server has an incorrect default gateway configuration.

5. A systems engineer is adding a new 1GB XFS filesystem that should be temporarily mounted under /ops/app.

Which of the following is the correct list of commands to achieve this goal?

A)

Option A

Option B

Option C

Option D

6. A systems administrator is notified that the mysqld process stopped unexpectedly.

The systems administrator issues the following command:

sudo grep Ci -r ‘out of memory’ /var/log

The output of the command shows the following:

kernel: Out of memory: Kill process 9112 (mysqld) score 511 or sacrifice child.

Which of the following commands should the systems administrator execute NEXT to troubleshoot this issue? (Select two).

free -h

nc -v 127.0.0.1 3306

renice -15 $( pidof mysql )

lsblk

killall -15

vmstat -a 1 4

7. A Linux engineer has been notified about the possible deletion of logs from the file /opt/app/logs. The engineer needs to ensure the log file can only be written into without removing previous entries.

Which of the following commands would be BEST to use to accomplish this task?

chattr +a /opt/app/logs

chattr +d /opt/app/logs

chattr +i /opt/app/logs

chattr +c /opt/app/logs

8. A developer is trying to install an application remotely that requires a graphical interface for installation. The developer requested assistance to set up the necessary environment variables along with X11 forwarding in SSH.

Which of the following environment variables must be set in remote shell in order to launch the graphical interface?

$RHOST

SETENV

$SHELL

$DISPLAY

9. A systems administrator pressed Ctrl+Z after starting a program using the command line, and the shell prompt was presented.

In order to go back to the program, which of the following commands can the administrator use?

10. A systems administrator is tasked with creating an Ansible playbook to automate the installation of patches on several Linux systems.

In which of the following languages should the playbook be written?

SQL

YAML

HTML

JSON

Page 2 of 5

11. An administrator transferred a key for SSH authentication to a home directory on a remote server. The key file was moved to .ssh/authorized_keys location in order to establish SSH connection without a password. However, the SSH command still asked for the password.

Given the following output:

Which of the following commands would resolve the issue?

restorecon .ssh/authorized_keys

ssh_keygen -t rsa -o .ssh/authorized_keys

chown root:root .ssh/authorized_keys

chmod 600 .ssh/authorized_keys

12. A user generated a pair of private-public keys on a workstation.

Which of the following commands will allow the user to upload the public key to a remote server and enable passwordless login?

scp ~/.ssh/id_rsa user@server:~/

rsync ~ /.ssh/ user@server:~/

ssh-add user server

ssh-copy-id user@server

13. A Linux administrator created the directory /project/access2all. By creating this directory, the administrator is trying to avoid the deletion or modification of files from non-owners.

Which of the following will accomplish this goal?

chmod +t /project/access2all

chmod +rws /project/access2all

chmod 2770 /project/access2all

chmod ugo+rwx /project/access2all

14. Some servers in an organization have been compromised. Users are unable to access to the organization’s web page and other services.

While reviewing the system log, a systems administrator notices messages from the kernel regarding firewall rules:

Which of the following commands will remediate and help resolve the issue?

A)

Option A

Option B

Option C

Option D

15. A server is experiencing intermittent connection issues. Some connections to the Internet work as intended, but some fail as if there is no connectivity.

The systems administrator inspects the server configuration:

Which of the following is MOST likely the cause of the issue?

An internal-only DNS server is configured.

The IP netmask is wrong for ens3.

Two default routes are configured.

The ARP table contains incorrect entries.

16. An administrator accidentally deleted the /boot/vmlinuz file and must resolve the issue before the server is rebooted.

Which of the following commands should the administrator use to identify the correct version of this file?

rpm -qa | grep kernel; uname -a

yum -y update; shutdown -r now

cat /etc/centos-release; rpm -Uvh --nodeps

telinit 1; restorecon -Rv /boot

17. An administrator deployed a Linux server that is running a web application on port 6379/tcp.

SELinux is in enforcing mode based on organization policies.

The port is open on the firewall.

Users who are trying to connect to a local instance of the web application receive Error 13, Permission denied.

The administrator ran some commands that resulted in the following output:

Which of the following commands should be used to resolve the issue?

semanage port -d -t http_port_t -p tcp 6379

semanage port -a -t http_port_t -p tcp 6379

semanage port -a http_port_t -p top 6379

semanage port -l -t http_port_tcp 6379

18. Developers have requested implementation of a persistent, static route on the application server. Packets sent over the interface eth0 to 10.0.213.5/32 should be routed via 10.0.5.1.

Which of the following commands should the administrator run to achieve this goal?

route -i etho -p add 10.0.213.5 10.0.5.1

route modify eth0 +ipv4.routes "10.0.213.5/32 10.0.5.1"

echo "10.0.213.5 10.0.5.1 eth0" > /proc/net/route

ip route add 10.0.213.5/32 via 10.0.5.1 dev eth0

19. A systems administrator made some unapproved changes prior to leaving the company. The newly hired administrator has been tasked with revealing the system to a compliant state.

Which of the following commands will list and remove the correspondent packages?

dnf list and dnf remove last

dnf remove and dnf check

dnf info and dnf upgrade

dnf history and dnf history undo last

20. A user is asking the systems administrator for assistance with writing a script to verify whether a file exists.

Given the following:

Which of the following commands should replace the <CONDITIONAL> string?

if [ -f "$filename" ]; then

if [ -d "$filename" ]; then

if [ -f "$filename" ] then

if [ -f "$filename" ]; while

Page 3 of 5

21. Which of the following commands will display the operating system?

uname -n

uname -s

uname -o

uname -m

22. A DevOps engineer needs to allow incoming traffic to ports in the range of 4000 to 5000 on a Linux server.

Which of the following commands will enforce this rule?

iptables -f filter -I INPUT -p tcp --dport 4000:5000 -A ACCEPT

iptables -t filter -A INPUT -p tcp --dport 4000:5000 -j ACCEPT

iptables filter -A INPUT -p tcp --dport 4000:5000 -D ACCEPT

iptables filter -S INPUT -p tcp --dport 4000:5000 -A ACCEPT

23. A cloud engineer needs to change the secure remote login port from 22 to 49000.

Which of the following files should the engineer modify to change the port number to the desired value?

/etc/host.conf

/etc/hostname

/etc/services

/etc/ssh/sshd_config

24. A systems administrator is encountering performance issues. The administrator runs 3 commands with the following output

The Linux server has the following system properties

CPU: 4 vCPU

Memory: 50GB

Which of the following accurately describes this situation?

The system is under CPU pressure and will require additional vCPUs

The system has been running for over a year and requires a reboot.

Too many users are currently logged in to the system

The system requires more memory

25. A new Linux systems administrator just generated a pair of SSH keys that should allow connection to the servers.

Which of the following commands can be used to copy a key file to remote servers? (Choose two.)

wget

ssh-keygen

ssh-keyscan

ssh-copy-id

ftpd

scp

26. A systems administrator needs to reconfigure a Linux server to allow persistent IPv4 packet forwarding.

Which of the following commands is the correct way to accomplish this task?

echo 1 > /proc/sys/net/ipv4/ipv_forward

sysctl -w net.ipv4.ip_forward=1

firewall-cmd --enable ipv4_forwarding

systemctl start ipv4_forwarding

27. A Linux administrator needs to create an image named sda.img from the sda disk and store it in the /tmp directory.

Which of the following commands should be used to accomplish this task?

dd of=/dev/sda if=/tmp/sda.img

dd if=/dev/sda of=/tmp/sda.img

dd --if=/dev/sda --of=/tmp/sda.img

dd --of=/dev/sda --if=/tmp/sda.img

28. An administrator recently updated the BIND software package and would like to review the default configuration that shipped with this version.

Which of the following files should the administrator review?

/etc/named.conf.rpmnew

/etc/named.conf.rpmsave

/etc/named.conf

/etc/bind/bind.conf

29. After installing a new version of a package, a systems administrator notices a new version of the corresponding, service file was Installed In order to use the new version of the, service file, which of the following commands must be Issued FIRST?

systemctl status

systemctl stop

systemctl reinstall

systemctl daemon-reload

30. A Linux user reported the following error after trying to connect to the system remotely:

ssh: connect to host 10.0.1.10 port 22: Resource temporarily unavailable

The Linux systems administrator executed the following commands in the Linux system while trying to diagnose this issue:

Which of the following commands will resolve this issue?

firewall-cmd --zone=public --permanent --add-service=22

systemctl enable firewalld; systemctl restart firewalld

firewall-cmd --zone=public --permanent --add-service=ssh

firewall-cmd --zone=public --permanent --add-port=22/udp

Page 4 of 5

31. A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots.

Which of the following commands should be run on the DNS forwarder server to accomplish this task?

ufw allow out dns

systemctl reload firewalld

iptables -A OUTPUT -p udp -ra udp -dport 53 -j ACCEPT

flrewall-cmd --zone-public --add-port-53/udp --permanent

32. Which of the following technologies provides load balancing, encryption, and observability in containerized environments?

Virtual private network

Sidecar pod

Overlay network

Service mesh

33. A systems administrator created a web server for the company and is required to add a tag for the API so end users can connect.

Which of the following would the administrator do to complete this requirement?

hostnamectl status --no-ask-password

hostnamectl set-hostname "$(perl -le "print" "A" x 86)"

hostnamectl set-hostname Comptia-WebNode -H [email protected]

hostnamectl set-hostname Comptia-WebNode --transient

34. A Linux engineer needs to download a ZIP file and wants to set the nice of value to -10 for this new process.

Which of the following commands will help to accomplish the task?

$ nice -v -10 wget https://foo.com/installation.zip

$ renice -v -10 wget https://foo.com/installation.2ip

$ renice -10 wget https://foo.com/installation.zip

$ nice -10 wget https://foo.com/installation.zip

35. A cloud engineer is installing packages during VM provisioning.

Which of the following should the engineer use to accomplish this task?

Cloud-init

Bash

Docker

Sidecar

36. A Linux engineer receives reports that files created within a certain group are being modified by users who are not group members. The engineer wants to reconfigure the server so that only file owners and group members can modify new files by default.

Which of the following commands would accomplish this task?

chmod 775

umask 002

chactr -Rv

chown -cf

37. A Linux administrator recently downloaded a software package that is currently in a compressed file.

Which of the following commands will extract the files?

unzip -v

bzip2 -z

gzip

funzip

38. A Linux administrator modified the SSH configuration file.

Which of the following commands should be used to apply the configuration changes?

systemctl stop sshd

systemctl mask sshd

systemctl reload sshd

systemctl start sshd

39. A Linux administrator needs to remove software from the server.

Which of the following RPM options should be used?

rpm -s

rm -d

rpm -q

rpm -e

40. Which of the following files holds the system configuration for journal when running systemd?

/etc/systemd/journald.conf

/etc/systemd/systemd-journalctl.conf

/usr/lib/systemd/journalctl.conf

/etc/systemd/systemd-journald.conf

Page 5 of 5

41. Several users reported that they were unable to write data to the /oracle1 directory.

The following output has been provided:

Which of the following commands should the administrator use to diagnose the issue?

df -i /oracle1

fdisk -1 /dev/sdb1

lsblk /dev/sdb1

du -sh /oracle1

42. A systems technician is working on deploying several microservices to various RPM-based systems, some of which could run up to two hours.

Which of the following commands will allow the technician to execute those services and continue deploying other microservices within the same terminal section?

gedit & disown

kill 9 %1

fg %1

bg %1 job name

43. A Linux system is failing to start due to issues with several critical system processes.

Which of the following options can be used to boot the system into the single user mode? (Choose two.)

Execute the following command from the GRUB rescue shell: mount -o remount, ro/sysroot.

Interrupt the boot process in the GRUB menu and add systemd.unit=single in the kernel line.

Interrupt the boot process in the GRUB menu and add systemd.unit=rescue.target in the kernel line.

Interrupt the boot process in the GRUB menu and add single=user in the kernel line.

Interrupt the boot process in the GRUB menu and add init=/bin/bash in the kernel line.

Interrupt the boot process in the GRUB menu and add systemd.unit=single.target in the kernel line.

44. A Linux systems administrator receives a notification that one of the server’s filesystems is full.

Which of the following commands would help the administrator to identify this filesystem?

lsblk

fdisk

df -h

du -ah

45. A systems administrator is tasked with preventing logins from accounts other than root, while the file /etc/nologin exists.

Which of the following PAM modules will accomplish this task?

pam_login.so

pam_access.so

pam_logindef.so

pam_nologin.so

46. A Linux system fails to start and delivers the following error message:

Which of the following commands can be used to address this issue?

fsck.ext4 /dev/sda1

partprobe /dev/sda1

fdisk /dev/sda1

mkfs.ext4 /dev/sda1

47. A Linux administrator wants to set the SUID of a file named dev_team.text with 744 access rights.

Which of the following commands will achieve this goal?

chmod 4744 dev_team.txt

chmod 744 --setuid dev_team.txt

chmod -c 744 dev_team.txt

chmod -v 4744 --suid dev_team.txt

48. A development team asks an engineer to guarantee the persistency of journal log files across system reboots.

Which of the following commands would accomplish this task?

grep -i auto /etc/systemd/journald.conf && systemctl restart systemd-journald.service

cat /etc/systemd/journald.conf | awk '(print $1,$3)'

sed -i 's/auto/persistent/g' /etc/systemd/journald.conf && sed -i 'persistent/s/ˆ#//q' /etc/systemd/journald.conf

journalctl --list-boots && systemctl restart systemd-journald.service

49. A Linux administrator rebooted a server. Users then reported some of their files were missing. After doing some troubleshooting, the administrator found one of the filesystems was missing. The filesystem was not listed in /etc/f stab and might have been mounted manually by someone prior to reboot.

Which of the following would prevent this issue from reoccurring in the future?

Sync the mount units.

Mount the filesystem manually.

Create a mount unit and enable it to be started at boot.

Remount all the missing filesystems

CompTIA Linux+ XK0-005 Study Guide Updated To Be Your Good Learning Materials

CompTIA Linux+ XK0-005 Study Guide Updated To Be Your Good Learning Materials

Share this post

Leave a Reply Cancel reply

Related Posts