Try Free CompTIA Linux+ XK0-004 Practice Exam Questions

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1. An administrator is reviewing updates in the master online Git repository and notices a file named .htaccess.

The file contains passwords and should only be in the administrator’s local repository, not the online one.

Which of the following would prevent this file from appearing online in the future?

git commit -m "File Update" -x .htaccess

sed -i 's/#Preserve Hidden=True/Preserve Hidden=True/g' .git/config

chown nobody:nodoby .htaccess

echo ".htaccess" >> .gitignore

2. The Apache web server was recently installed on a Debian/Ubuntu server. The web server fails and a review of log messages on another partition reveals the installation was not completed properly due to lack of disk space.

After clearing the files, the systems administrator has requested the installation to be performed again.

Which of the following command lines will perform this task? (Choose two.)

apt-get install apache2

apt-get --purge remove acache2

apt-get --reinstall install apache2

apt-get --reinstall apache2

3. A junior Linux administrator is optimizing a system in which an application needs to take priority 0 when running the process.

The administrator runs the ps command and receives the following output:

Given this scenario, which of the following steps will address this issue?

Issue the command ronice Cn 0 Cp 8481

Issue the command renice Cp 8481

Issue the command renice Cp 0 ~n 8481

Issue the command renice Cn 8481

4. An administrator needs to look at a log for an application on a systemd-based system. There is no log for this application in /var/log.

Which of the following is another way to view the application log on this system?

tail -f /var/log/secure

journalctl Cu application

systemctl application.service

watch /var/lib/application/

5. Users in the sales department are unable to create new files in the shared directory /Sales. A junior Linux administrator determines the permissions on the /Sales directory are set to rwxr-----, and

sales is the group owner of the directory.

Which of the following is the BEST command for the junior administrator to issue to allow the users to create new files?

umask 002

chmod 770 /Sales

chmod g+s /Sales

chmod 777 /Sales

6. CORRECT TEXT

Find the file named core and remove it from the system.

INSTRUCTIONS

Type “help” to display a list of available commands.

If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

7. A user issues the following command:

ls Cl /var/log | egrep Ce ‘^d[rwx]{3}.*[rw-]{3}.*’

The list of files in the system is shown below:

Which of the following results matches the command issued?

drwxr-x--- 2 root adm 4096 Apr 25 14:41 unattended-upgrades drwxr-x--- 2 root adm 4096 Apr 25 15:41 attended-upgrades

drwxr-xr-x 2 root root 4096 Apr 24 08:36 apt drwxr-xr-x 2 root root 4096 Apr 9 14:25 dist-upgrade drwxr-x--- 2 root adm 4096 Apr 25 14:41 unattended-upgrades

drwxr-xr-x 2 root root 4096 Apr 24 08:36 apt drwxr-xr-x 2 root root 4096 Apr 9 14:25 dist-upgrade drwxr-x--- 2 root adm 4096 Apr 25 15:41 attended-upgrades

-rw-r--r-- 1 root root 2877 Apr 24 14:14 alternatives.log -rw-r--r-- 1 syslog adm 246139 Jun 12 15:21 cloud-init.log -rw-r--r-- 1 root root 8872 Jun 12 15:21 cloud-init-output.log

8. A Linux administrator needs to schedule a cron job to run at 1:15 p.m. every Friday to report the amount of free disk space on the system and to send the output to a file named “freespace”.

Which of the following would meet this requirement?

13 15 * * 5 df > /freespace

15 13 * * 5 df > /freespace

15 1 * * 6 df > /freespace

15 13 6 * * df > /freespace

9. The following tools help maintain consistency across different systems in an infrastructure:

SUSE Manager

Red Hat Satellite

Spacewalk

If a system file is changed, the tools roll back the file to a predefined configuration.

Which of the following concepts BEST describes this behavior?

Build automation

Infrastructure as code

Automated configuration management

Agentless system management

10. A Linux administrator is using a public cloud provider to host servers for a company’s website. Using the provider’s tools, the administrator wrote a JSON file to define how to deploy the servers.

Which of the following techniques did the administrator use?

Infrastructure as code

Build automation

Platform as a service

Automated configuration

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11. A systems administrator has scheduled a system update for a server. The update includes a resynchronization of the package database and updates to the current packages and the system distribution packages.

Which of the following commands contains the proper order of this update?

apt-get upgrade, apt-get dist-upgrade, apt-get update

apt-get update, apt-get upgrade, apt-get dist-upgrade

apt-get dist-upgrade, apt-get upgrade, apt-get update

apt-get update, apt-get dist-upgrade, apt-get upgrade

12. 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?

VNC

rdesktop

SPICE

XRDP

13. A junior Linux administrator needs to create 16 empty files quickly that will contain sales information for each quarter for the past four years.

Which of the following commands will meet this requirement?

touch {2015,2016,2017,2018}.{q1,q2,q3,q4}

touch [2015,2016,2017,2018].[q1,q2,q3,q4]

touch ‘2015,2016,2017,2018‘.‘q1,q2,q3,q4‘

touch {2015.2016.2017.2018}.{q1.q2.q3.q4}

14. 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?

systemctl service on

systemctl enable <name>.service

systemctl service enable

systemctl on <name>.service

15. A Linux administrator needs to back up the folder /usr/domain, and the output must be a gzip compressed tar.

Which of the following commands should be used?

tar Ccv domain.tar.gz /usr/domain

tar Ccvf /usr/domain domain.tar.gz

tar Cczvf domain.tar.gz /usr/domain

tar Ccxzv /usr/domain domain.tar.gz

16. Users in the payroll department are not configured to use DNS due to security concerns. The users ask the junior Linux administrator to configure their workstations to access the payroll server at 192.168.204.11 by the name “Payroll”.

Which of the following commands should the administrator issue to meet this request?

echo “nameserver 192.168.204.11 #Payroll” >> /etc/resolv.conf

echo “net.ipv4.ip_dynaddr=192.168.204.11 Payroll” >> /etc/sysctl.conf

echo “192.168.204.11 Payroll” >> /etc/hosts

echo ‘IPADDR=”192.168.204.11” #Payroll’ >> /etc/network/interface

17. A technical support engineer receives a ticket from a user who is trying to create a 1KB file in the /tmp directory and is getting the following error No space left on device. The support engineer checks the /tmp directory, and it has 20GB of free space.

Which of the following BEST describes a possible cause for this error?

The /tmp directory is not mounted.

The filesystem is formatted with a 4MB block size.

the filesystem ran out of inodes.

The /tmp directory has been set with an immutable attribute.

18. A junior Linux administrator is trying to verify connectivity to the remote host host1 and display round-trip statistics for ten ICMP.

Which of the following commands should the administrator execute?

ping Cc 10 host1

traceroute Cc 10 host1

netstat host1

pathping Cc 10 host1

19. Joe, a user, creates a short shell script, shortscript.sh, and saves it in his home directory with default

permissions and paths. He then attempts to run the script by typing ./shortscript.sh, but the command

fails to execute.

Which of the following commands would have allowed the script to run?

chmod u+x shortscript.sh

source ./shortscript.sh

chmod 155 ~/shortscript.sh

chgrp shortscript.sh Joe

20. A junior systems administrator is upgrading a package that was installed on a Red Hat-based system.

The administrator is tasked with the following:

Update and install the new package.

Verify the new package version is installed.

Which of the following should be done to BEST accomplish these task? (Choose two.)

yum install <package name>

yum upgrade

rpm Ce <package name>

rpm Cqa

apt-get <package name>

apt-get upgrade

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21. An administrator receives a warning about a file system filling up, and then identifies a large file located at /tmp/largelogfile. The administrator deletes the file, but no space is recovered on the file system.

Which of the following commands would BEST assists the administrator in identifying the problem?

lsof | grep largelogfile

pkill /tmp/largelogfile

pgrep largelogfile

ps Cef | grep largelogfile

22. A Linux system is running normally when the systems administrator receives an alert that one application spawned many processes. The application is consuming a lot of memory, and it will soon cause the machine to become unresponsive.

Which of the following commands will stop each application process?

kill ‘pidof application’

killall application

kill -9 ‘ps Caux | grep application’

pkill -9 application

23. Given the output below:

Which of the following commands can be used to remove MyPhoto.jpg from the current directory?

unlink ./MyPhoto.jpg

del Pictures/photo.jpg

rm Crf ./Pictures

rm Cf MyPhoto.jpg

ln Crm ./Pictures/photo.jpg

24. On a UEFI-based system, which of the following invokes GRUB2 from the EFI command prompt?

boot//EFI/grub2.efi

EFI/grub2.efi

/boot/EFI/grub2.efi

/grub2.efi

25. Which of the following configuration management tools is considered agentless?

Ouppet

Salt

Ansible

Chef

26. Which of the following is modified to reconfigure the boot environment?

grub-mkconfig

grub.cfg

update-grub

grub2-mkconfig

27. A file server is sharing a directory called /share between team members inside a company. The fileshare needs to be moved from serverA to /newshare located on serverB with all permissions and attributes preserved.

Which of the following commands would BEST achieve this task?

rsync -aHAX /share/* serverB:/newshare

dd if=/share/* of=serverB:/newshare

tar -cvf /share/* serverB:/newshare

mirrorlv /share/* serverB:/newshare

28. A Linux administrator wants to fetch a Git repository from a remote Git server.

Which of the following is the BEST command to perform this task?

git checkout

git clone

git merge

git config

29. Which of the following statements BEST represents what the term “agentless” means regarding orchestration?

Installation of a tool is not required on the remote system to perform orchestration tasks

It facilitates version control when using infrastructure as code during orchestration

It automatically removes malware from the remote system during orchestration

A tool can only be accessed remotely to perform orchestration tasks

30. A systems administrator has finished building a new feature for the monitoring software in a separate Git branch.

Which of the following is the BEST method for adding the new feature to the software’s master branch?

Merge the changes from the feature branch to the master branch.

Save the changes to the master branch automatically with each Git commit.

Clone the feature branch into the master branch.

Pull the changes from the feature branch into the master branch.

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31. A systems administrator notices several intensive tasks executing from users Joe and Ann. These processes are impacting server operations but must be allowed to continue running.

Which of the following commands should the systems administrator run to reduce the impact on the server?

pkill -u joe ann

renice 11 -u joe ann

nohup -u joe ann

strace -u joe ann

32. Which of the following BEST describes build automation?

Automating the creation of software and related processes

Automatically categorizing servers in the infrastructure

Managing and provisioning servers via automatic templates

Bringing systems in line with the desired automated configuration

33. A systems administrator suspects a process with a PID of 2864 is consuming resources at an alarming rate.

The administrator uses the command renice -n -5 -p2864, but it does not solve the issue.

Which of the following commands should the administrator execute to correct the issue?

nice -n 5 -p 2864

nice -n -5 -p 2864

renice -n 10 -p 2864

renice -n -10 -p 2864

34. Which of the following servers provides encrypted tunnel SOCKS services?

SNMP

VPN

SSH

35. Which of the following BEST describes the difference between a container and a VM?

Containers share host OS libraries and a kernel, while VMs have their own libraries and kernel.

Containers are larger than VMs.

VMs share host libraries and a kernel, while containers have their own libraries and kernel.

VMs are larger than containers.

36. A four-drive Linux NAS has been improperly configured. Each drive has a capacity of 6TB, for a total storage capacity of 24TB.

To reconfigure this unit to be not pluggable for drive replacement and provide total storage of 11TB to 12TB, which of the following would be the correct RAID configuration?

RAID 01

RAID 03

RAID 10

RAID 50

37. A Linux administrator receives the following while attempting to remove a file:

Which of the following commands will resolve the issue?

cattr -i test.txt

setfacl -m u:root:x test.txt

chmod -0775 test.txt

chcon -u system_u test.txt

38. A user tries to log in to the Linux console and receives the following message:

Your account has expired; Please contact your system administrator.

Which of the following commands was MOST likely run to create this behavior?

passwd

usermod

userdel

chage

39. A Linux administrator has downloaded and installed the httpd package.

Which of the following commands will start the service immediately and allow the service to start on system boot?

systemctl start httpd;chkconfig httpd on

systemctl status httpd;chkconfig httpd on

systemctl.start httpd;chkconfig httpd on

systemctl start httpd;chkconfig httpd on 6

40. A systems administrator wants to mount an ISO to access its content.

Using /mnt as a mount point, which of the following is the correct syntax?

mount -o iso9660 /dev/sr0 /mnt

mount -o loop -t iso /mnt

mount -o loop /tmp/image.iso /mnt

mount -o loop /dev/kvm /mnt

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41. Which of the following is used in unattended server installation via PXE?

Kickstart

YAML

Cloud-init

Container image

42. A Linux administrator needs to prevent the Postfix mail transfer agent from starting on boot.

Which of the following commands will accomplish this task?

systemctl stop postfix.service

/etc/init.d/postfix stop

systemctl disable postfix.service

/etc/init.d/postfix disable

43. Which of the following commands will let a Linux user know the PCI devices that are installed in the system?

cat /proc/devices/pci

lspci

lsdev

cat /proc/sys/dev

44. 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 this problem?

rm -Rf ~/.*

fsck -y /dev/sda1

df -i

fdisk /dev/sda

45. 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 fsgsbase

Which of the following is the MOST likely reason for the errors?

The processor supports AMD instructions rather than Intel.

The processor cannot accelerate decryption.

The processor does not support hyperthreading.

The processor is running inside a virtual machine.

46. An administrator notices that a long-running script, /home/user/script.sh, is taking up a large number of system resources. The administrator does not know the script’s function.

Which of the following commands should the administrator use to minimize the script’s impact on system resources?

renice

kill

nohup

47. Which of the following default files are typically used to contain a list of public keys from other computers? (Choose two.)

~/.ssh/authorized_keys

~/.ssh/config

~/.ssh/id_dsa.pub

~/.ssh/known_hosts

~/.ssh/id_rsa

~/.ssh/id_rsa.pub

48. A systems administrator configured a new kernel module, but it stopped working after reboot.

Which of the following will allow the systems administrator to check for module problems during server startup?

lsmod

modprobe

modinfo

dmesg

49. An administrator is analyzing a Linux server which was recently hacked.

Which of the following will the administrator use to find all unsuccessful login attempts?

nsswitch

faillock

pam_tally2

passwd

50. Which of the following Linux server roles should be installed to monitor and log local web traffic?

Proxy server

AAA server

SSH server

HTTP server

Name server

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51. A company wants to ensure that all newly created files can be modified only by their owners and that all new directory content can be changed only by the creator of the directory.

Which of the following commands will help achieve this task?

umask 0022

umask 0012

chmod CR 0644 /

chmod CR 0755 /

52. A new HTTPS web service is being deployed on a server.

Which of the following commands should the Linux administrator use to ensure traffic is able to flow through the system firewall to the new service?

iptables CI OUTPUT Cp tcp --sport 443 Cj ACCEPT

iptables CA INPUT Cp tcp --dport 443 Cj ACCEPT

iptables CI INPUT --dport 443 Cj ACCEPT

iptables CA OUTPUT Cp tcp --dport 443 Cj ACCEPT

53. 168.192.12 database01.comptia.org

54. A Linux systems administrator needs to copy the contents of a directory named “working” on the local working system to a folder /var/www/html on a server named “corporate-web”.

Which of the following commands will allow the administrator to copy all the contents to the web server?

scp Cr working/* webuser@corporate-web:/var/www/html

tar working/* webuser@corporate-web:/var/www/html

cp Cr working/* webuser@corporate-web:/var/www/html

mv working webuser@corporate-web:/var/www/html

55. When requesting SSH access to a remote system, a user accidentally emailed the id_rsa key to the

administrator.

Which of the following should the user do NEXT?

Run the ssh-add command to add the remote system to known_hosts.

Ask the administrator to run chmod 600 id_rsa on the remote system.

Delete id_rsa key file and send the id_rsa.pub key file instead.

Stop using that key and run ssh-keygen to generate a new key pair.

56. The following represents a partial listing of a user’s .bashrc file:

HISTSIZE=800

HISTFILESIZE=1000

umask 2002

HISTCONTROL=ignoreboth

When the user opens a terminal, an error message appears:

Octal number out of range

Which of the following lines in the partial .bashrc should be modified to prevent the error from occurring?

HISTSIZE=800

HISTFILESIZE=1000

umask 2002

HISTCONTROL=ignoreboth

57. A systems administrator wants to verify the DNS information of a system that is in production.

Which of the following will provide this information?

nmap -R 10.10.20.21 10.10.1.10

whois -r -h 10.10.1.10 10.10.20.21

dig -x 10.10.20.21 @10.10.1.10

route 10.10.20.21 gw 10.10.1.10

58. Which of the following is true about Type 2 hypervisors?

Type 2 hypervisors run on top of another general purpose O

Type 2 hypervisors are often called bare-metal or native hypervisors.

Type 2 hypervisors offer a performance increase to the guests in comparison to a Type 1 hypervisor.

Only Type 2 hypervisors allow direct access to CPU virtualization features.

59. A Linux administrator needs every new file created on a directory to maintain the group permissions of the same directory.

Which of the following commands would satisfy this requirement?

chmod o+s <directory>

chmod u+s <directory>

chmod +s <directory>

chmod g+s <directory>

60. A directory called /employee is shared with many employees in a company. New hardware was acquired, and the systems administrator needs to back up all files in /employee before the server is replaced.

Which of the following commands should be used to back up all the files and compress them to use little space in the filesystem?

tar -zcvf backup.tar.gz /employee

tar -zxvf backup.tar.gz /employee

tar -Cvf backup.tar.gz /employee

tar -Tpf backup.tar.gz /employee

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61. Which of the following are Linux desktop managers? (Choose two.)

KDE

GNOME

GUI

VNC

X11

SPICE

62. A Linux systems administrator is troubleshooting an issue with the /home directory running out of space. The administrator needs to determine which /home directories are using the most space.

Which of the following commands should be used?

lvs

fsck

63. A junior Linux administrator is setting up system-wide configuration settings.

The goal is to ensure the PATH environment variable includes the following locations for all users who log into a Linux system.

The administrator issues the following commands at the terminal:

Respectively, the output of these commands is as follows:

Given this output, which of the following would be the BEST action for the administrator to perform to address this issue?

Update the /etc/profile.d file using a text editor, navigate to the PATH element add the missing locations, and run the bash_completion.sh script to update the changes.

Update the /etc/profile file using a text editor, navigate to the PATH element, add the missing locations and run the . /etc/profile command to update the changes.

Update the /etc/profile.d file using a text editor, navigate to the PATH element, add the missing locations, and reboot to update the changes.

Update the /etc/profile file using a text editor navigate to the PATH element, add the missing locations, and restart the bash process to update the changes.

64. A networked has been crashing intermittently. A Linux administrator would like to write a shell script that will attempt to ping the server and email an alert if the server fails to respond. The script will later be scheduled via cron job.

Which of the following scripts would BEST accomplish this task?

Option A

Option B

Option C

Option D

65. A Linux administrator needs to take stock of USB devices attached to the system.

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

lspci

lsusb

cat /proc/USB

modprobe -Cusb

66. An engineer is working on a production application deployment that requires changing a web application property file called server.property that is managed by the Git version control system. A cloned copy of the remote repository in which the server.property file exists is on the local desktop computer. The engineer makes appropriate changes to the files, saves it as server.property, and executes git commit Cm “changed the property file” server.property.

Which of the following commands did the engineer fail to perform?

git init server.property

git merge server.property

git add server.property

git push server.property

67. A Linux administrator built a GitLab server. Later that day, a software engineer tried to access the server to upload the repository during the final step of installation. The software engineer could not access the website.

Which of the following firewall rules would allow access to this site?

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate NEW, ESTABLISHED Cj ACCEPT

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate ESTABLISHED Cj ACCEPT

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate RELATED, ESTABLISHED Cj ACCEPT

iptables CA INPUT Cp tcp Cm multiport --dports 80,443 Cm conntrack Ccstate NEW, ESTABLISHED Cj REJECT

68. All users are reporting that they cannot connect to the SFTP server.

The administrator runs a scan:

Which of the following would allow the administrator to fix the problem?

Allow SFTP connections on port 22 using /etc/sysconfig/iptables.

Allow SFTP connections on port 20 and 21 using /etc/sysconfig/iptables.

Allow SFTP connections on port 25 using /etc/sysconfig/iptables.

Allow SFTP connections on port 1456 using /etc/sysconfig/iptables.

69. A customer reports a Linux production server is randomly suffering degraded performance.

The administrator verifies that the sysstat package is installed and enabled on the server.

Which of the following would BEST determine what is causing the impact on performance?

Create a cron job that runs uptime every 15 minutes to collect historical data of the load average of the system.

Leave a ping running overnight from a laptop to the server to catch any latency encountered.

Analyze the data in /var/log/sa using the sar command.

Open a screen session and run top inside of it. Let it run over night and collect the data.

70. A systems administrator needs to append output of ls Clha /opt command to the contents of a test.txt file.

Which of the following commands will accomplish this?

ls Clha /opt > test.txt

ls Clha /opt < test.txt

ls Clha /opt >> test.txt

ls Clha /opt << test.txt

Page 8 of 9

71. A technician wants to secure a sensitive workstation by ensuring network traffic is kept within the local subnet.

To accomplish this task, the technician executes the following command:

echo 0 > /proc/sys/net/ipv4/ip_default_ttl

Which of the following commands can the technician use to confirm the expected results? (Choose two.)

tcpdump

traceroute

route

iperf

arp

72. A systems administrator uses a remote execution engine to iterate through each IP address in a network and run a script on remote hosts. The script captures the remote system's hostname, IP address, OS distribution, and system uptime. The output of the script gets saved to the administrator's local workstation for future processing.

Which of the following is this an example of?

Performance monitoring

Inventory

Agentless

Infrastructure as code

Build automation

73. Users are reporting collaborate.company.com is inaccessible from the user VLAN, but there is no issue connecting to the system’s web page from the DMZ.

Given the following outputs from commands run on the system:

Which of the following explains why users are unable to access the system from the user VLAN, and how can the administrator remediate this issue?

Users cannot access the system because the IP subnet mask is /24. The remediation for this issue is to set the IP subnet mask to /16.

Users cannot access the system because the DNS server has the incorrect IP address. The remediation for this issue is to edit the DNS configuration to point to the correct I

Users cannot access the system because the connectivity port is running on the incorrect I

The remediation for this issue is to edit the configuration file to listen on all interfaces.

Users cannot access the system because the default gateway has the wrong interface. The remediation for this issue is to set the default gateway to the proper interface.

74. A Linux administrator has downloaded the network-tools-12.1-17.i386.rpm package for installation to a local system. The administrator issues the rpm -ivh nerwork-cools-12.1-17.i386.rpm command to install the package. After attempting to use the newly installed package, the administrator realizes the package for the system’s architecture was not installed correctly.

Which of the following commands should the administrator use to remove the package from the system?

rpm -e network-tools

rpm -U network-tools-12.1-17.i386.rpm

rpm -ivh network-tools-12.1-17.i686.rpm

rpm -r network-tools

75. An operator finds a user is having issues with opening certain files.

Which of the following commands would allow the security administrator to list and check the SELinux context?

ls CD

ls Ca

ls CZ

ls -1

76. 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?

pam_tally2 --user=user --reset

passwd -u user -G root

usermod -u user -G root

chage -1 user=user --reset

77. A junior systems is configuring localization option environment variables.

The administrator is given a checklist of tasks with the following requirements:

View current settings of the LC_ALL environment variable only.

Modify the LANG environment variable to US English Unicode.

Given this scenario, which of the following should be performed to meet these requirements? (Choose two.)

echo $LC_ALL

locale

cat $LC_ALL

export LANG = en_U

UTF-8

export $LANG = en_U

UTF

stty

78. A Linux administrator recently changed the IP addresses of all the web servers from 10.10.50.x to 10.10.100.x. The administrator needs to update the serverlist.txt file to reflect the change.

The file contains the following:

10:WebSvr01:10.10.50.21:Main

11:WebSvr02:10.10.50.22:Acconting

12:WebSvr03:10.10.50.23:Intranet

20:NFS01:10.10.20.21:FileServer

30:SMTP01:10.10.30.31:Email

Which of the following commands will change the IP addresses and update the files in place?

sed 's|.50|.100|g' serverlist.txt

sed -g 's|.50|.100|a' serverlist.txt

sed -i 's|.50|.100|' serverlist.txt

sed -i 's|.50|.100|g' serverlist.txt

79. A junior Linux administrator is installing a new application with CPU architecture requirements that have the following specifications:

- x64 bit

- 3.0GHz speed

- Minimum quad core

The administrator wants to leverage existing equipment but is unsure whether the requirements of these systems are adequate. The administrator issues the following command cat/proc/cpuinfo.

The output of the command is as follows:

Which of the following is the recommended course of action the administrator should take based on this output?

Install the application, as the system meets the application requirements

Procure new equipment that matches the recommended specifications

Recompile the Linux kernel to support the installation.

Reconfigure lib modules to support the new application.

80. In order to comply with new security policies, an administrator needs to prevent the SSH server from using insecure algorithms.

Which of the following files should be edited to accomplish this?

/etc/ssh/sshd_config

/etc/ssh/ssh_config

~/.ssh/ssh_config

/etc/ssh/known_hosts

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81. DRAG DROP

The lead Linux has added a disk, /dev/sdd, to a VM that is running out of disk space.

Place the following steps in the correct order from first (1) to last (4) to add the disk to the existing LVM.