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CompTIA XK0-005 Dumps

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Total 487 questions

CompTIA Linux+ Exam Questions and Answers

Question 1

An administrator completes maintenance on a server but cannot remount the logical volume. Given the following output:

# mount /dev/data/files /opt/data/

mount: /opt/data: special device /dev/data/files does not exist.

# lvs

LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert

files data -wi-a------ 600.00m

# vgs

VG #PV #LV #SN Attr VSize VFree

data 1 1 0 wz—n- 1020.00m 420.00m

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

Options:

A.

vgchange -ay data

B.

lvscan --all

C.

vgimport data

D.

lvchange -ay /dev/data/files

Question 2

An administrator wants to copy files from /opt/tools to the home directory at /home/admin. Which of the following should the administrator run?

Options:

A.

mkdir -p /home/admin/tools

B.

cp -R /opt/tools ~

C.

cd /opt/tools; rsync /home/admin

D.

scp /opt/tools localhost:/

Question 3

Users report that they are unable to reach the company website A systems administrator confirms the issue with the following command:

# curl

curl: (7) Failed to connect to port 443: No route to host

The administrator logs in to the company’s web server to check its configuration and sees the following output:

root@comptia.org:-># firewall-cmd --list-all

public (active)

target: default

icmp-block-inversion: no

interfaces: dummy0 eth0

sources:

services: cockpit dhcpv6-client http ssh

ports: 3001/tcp

protocols:

forward: no

masquerade: no

forward-ports:

source-ports:

icmp-blocks:

rich rules:

rule family="ipv4" source address="61.177.173.6" port port="ssh" protocol="tcp" reject type="icmp-port-unreachable"

rule family="ipv4" source address="185.143.45.164" port port="ssh" protocol="tcp" reject type="icmp-port-unreachable"

rule family="ipv4" source address="143.198.60.41" port port="ssh" protocol="tcp" reject type="icmp-port-unreachable"

root@comptia.org:-># ip route

default via 172.31.1.1 dev eth0 proto dhcp src 65.21.187.65 metric 100

10.0.6.0/24 dev dummy0 proto kernel scope link src 10.0.6.65 metric 550

172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1

172.18.0.0/16 dev br-28ac2eaeeca1 proto kernel scope link src 172.18.0.1

172.19.0.0/16 dev br-fb3897555ca3 proto kernel scope link src 172.19.0.1 linkdown

172.31.1.1 dev eth0 proto dhcp scope link src 65.21.187.65 metric 100

192.168.224.0/20 dev br-e949ab177d79 proto kernel scope link src 192.168.224.1 linkdown

192.168.240.0/20 dev br-6adf72ac0ae3 proto kernel scope link src 192.168.240.1 linkdown

Which of the following is causing the issue?

Options:

A.

The web server's interface has no link.

B.

The default route on the web server is incorrect.

C.

HTTPS traffic is not allowed through the web server firewall.

D.

User IP addresses are rejected by the firewall.

Question 4

NO: 54:

A new hard drive /dev/sdd was added to a server. Which of the following commands will create a partition table with a single partition /dev/sdd1 that consumes the entire disk?

Options:

A.

echo 'type=83' | sudo sfdisk /dev/sdd

B.

sudo sfdisk /dev/sdd -t=83

C.

echo 'auto' | sudo fdisk /dev/sdd

D.

sudo fdisk /dev/sdd -1 -t=83

Question 5

Which of the following would significantly help to reduce data loss if more than one drive fails at the same time?

Options:

A.

Server clustering

B.

Load balancing

C.

RAID

D.

VDI

Question 6

A senior administrator has placed a private key for user admin in your home directory.

The server you need to remotely access is server1 and SSH is listening on port 2222.

INSTRUCTIONS

Part 1

Review the command output and build the correct command to place the private key

into your SSH folder.

Part 2

Review the command output and build the correct command to set the file

permissions.

Part 3

Review the command output and build the correct command to set the correct

ownership.

In each part, click on objects to build a complete command. Command objects may

be used more than once, but not all will be used. Use _ as the spacebar. Click the

arrow to remove any unwanted objects from your command.

Part 4

Select the proper file to edit for remote server access. Then, build the correct

configuration output based on the server name, ports, and files.

as

as

as

Options:

Question 7

An average of one out of three users in a company cannot reach the company website. A Linux administrator determines that one of the three website servers is down. The administrator inspects the DNS configuration for the website and notices the following entry:

nginx

WWW IN A 5.5.5.1

IN A 5.5.5.2

IN A 5.5.5.3

Which of the following accurately explains the issue?

Options:

A.

The DNS configuration is missing corresponding AAAA records and PTR records, and this is causing clients to fail the hostname translation.

B.

The administrator has incorrectly configured the DNS server to be an iterative resolver instead of an authoritative resolver.

C.

One of the DNS records has not been signed with a DNSSEC-supported key, and this is causing some web browsers to reject the DNS response.

D.

DNS returns all three records in a different order each time, and the browser typically uses the first address in the DNS response.

Question 8

As part of the requirements for installing a new application, the swappiness parameter needs to be changed to O. This change needs to persist across re-boots and be applied immediately. A Linux systems administrator is performing this change. Which of the following steps should the administrator complete to accomplish this task?

Options:

A.

echo "vm. swappiness—()" >> /etc/sysctl . conf && sysctl —p

B.

echo "vrn. >> / proc/meminfo && sysctl —a

C.

sysctl —v >> / proc/meminfo & & echo "vm. swapiness=0"

D.

sysctl —h "vm. swapiness—O" && echo / etc/vmswapiness

Question 9

A systems administrator is tasked with configuring a repository on an RPM-based Linux system. Which of the following need to be reviewed and modified? (Select two).

Options:

A.

/etc/yum.conf

B.

/etc/apt/sources.list.d

C.

/etc/pam.d

D.

/etc/apt.conf

E.

/etc/yum.repos.d

F.

/etc/ssh/ssh_config

Question 10

Which of the following concepts describes the approach of keeping all configurations in a repository?

Options:

A.

Inventory

B.

Infrastructure as Code

C.

Orchestration

D.

Agentless deployment

Question 11

A systems administrator is reviewing the following output on the text editor that is being used to update the company's internal database records:

Which of the following extensions should the systems administrator use when saving the file?

Options:

A.

.json

B.

.yaml

C.

.tf

D.

.sh

Question 12

A diagnostic tool reports a "host seems down" event for a server with an IP address of 192.168.47.44. Which of the following commands should the administrator use to confirm the host down event?

Options:

A.

nmap 192.168.47.0/32

B.

netcat 192.168.47.44

C.

nmap 192.168.47.44 -Pn

D.

ping -c 1 192.168.47.44

Question 13

NO: 60:

A Linux administrator is creating a directory called CompTIA_doc, and it needs to switch to another location to perform some system-related tasks. Which of the following commands should the administrator use for this task?

Options:

A.

mkdir CompTIA_doc & cd CompTIA_doc

B.

mkdir CompTIA_doc + cd CompTIA_doc

C.

mkdir CompTIA_doc || cd CompTIA_doc

D.

mkdir CompTIA_doc && cd CompTIA_doc

Question 14

NO: 66:

An administrator needs to stop a foreground process in between its execution in a terminal. Which of the following should the administrator use?

Options:

A.

Ctrl+D

B.

Ctrl+F

C.

Ctrl+Z

D.

Ctrl+C

Question 15

A Linux administrator deployed a large-scale application service as a containerized pod. The Linux administrator needs to continually send the application's log file to the company’s central log store. Which of the following should the Linux administrator do to efficiently perform this task?

Options:

A.

Configure a sidecar to perform log shipping

B.

Run docker exec to access the logs within the container

C.

Execute docker inspect and run a log rsync replication

D.

Set up a custom task scheduler via kubectl

Question 16

A systems administrator receives the following errors via email from the system log:

go

XFS (loop0): Metadata CRC error detected at xfs_agi_read_verify+0xcb/0xfe

XFS (loop0): First 128 bytes of corrupted metadata buffer

XFS (loop0): metadata I/O error in "xfs_trans_read_buf_map" at daddr 0x2 len 1 error 74

A few minutes later, the administrator starts receiving reports that some of the images in the company's website are not loading properly. The systems administrator runs some commands and receives the following outputs:

css

Output 1

NAME FSTYPE UUID MOUNTPOINT

sda ext4 02ae47-fe457-45bc /

sdb xfs 347c7056 /var/www/html

Output 2

DocumentRoot "/var/www/html"

Output 3

httpd.service - The Apache HTTP Server

Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)

Active: active (running) since Sun 1991-05-24 16:12:43 UTC; 30y ago

Main PID: 252 (httpd)

Which of the following would be the appropriate steps to take to solve this issue?

Options:

A.

systemctl stop httpd umount /dev/sdb1 xfs_repair /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

B.

umount /dev/sdb1 xfs_repair /dev/sdb1 xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl restart httpd

C.

umount /dev/sdb1 systemctl stop httpd xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

D.

systemctl stop httpd xfs_check -L /dev/sdb umount /var/www/html systemctl start httpd

Question 17

A systems administrator is creating new user accounts on several Linux machines and wants to automate the process from a Linux system used for operations. In this operations system, the list of servers is located in the /home/user/serverslist file and the list of user accounts is located in the /home/user/userslist file. Which of the following scripts will help accomplish this task?

Options:

A.

bashfor server in $(cat /home/user/serverslist) do for user in $(cat /home/user/userslist) do sudo useradd $user done done

B.

bashfor server in $(cat /home/user/serverslist) do ssh -i user@$server "for user in $(cat /home/user/userslist) do sudo useradd $user done; exit" done

C.

bashfor server in $(cat /home/user/serverslist) do scp /home/user/userslist user@$server:/tmp ssh -i user@$server "for user in $(cat /tmp/userslist) do sudo useradd $user done; exit" done

D.

bashssh user@$(cat /home/user/serverslist) "sudo useradd $(cat /home/user/userslist); exit"

Question 18

After connecting to a remote host via SSH, an administrator attempts to run an application but receives the following error:

[user@workstation ~]$ ssh admin@srv1

Last login: Tue Mar 29 18:03:34 2022

[admin@srvl ~] $ /usr/local/bin/config_manager

Error: cannot open display:

[admin@srv1 ~] $

Which of the following should the administrator do to resolve this error?

Options:

A.

Disconnect from the SSH session and reconnect using the ssh -x command.

B.

Add Options X11 to the /home/admin/.ssh/authorized_keys file.

C.

Open port 6000 on the workstation and restart the firewalld service.

D.

Enable X11 forwarding in /etc/ssh/ssh_config and restart the server.

Question 19

A user is unable to log on to a Linux workstation. The systems administrator executes the following command:

cat /etc/shadow | grep user1

The command results in the following output:

user1 :! $6$QERgAsdvojadv4asdvaarC/9dj34GdafGVaregmkdsfa:18875:0:99999:7 :::

Which of the following should the systems administrator execute to fix the issue?

Options:

A.

chown -R userl:user1 /home/user1

B.

sed -i '/ ::: / :: /g' /etc/shadow

C.

chgrp user1:user1 /home/user1

D.

passwd -u user1

Question 20

A Linux administrator is trying to start the database service on a Linux server but is not able to run it. The administrator executes a few commands and receives the following output:

Which of the following should the administrator run to resolve this issue? (Select two).

Options:

A.

systemctl unmask mariadb

B.

journalctl —g mariadb

C.

dnf reinstall mariadb

D.

systemctl start mariadb

E.

chkconfig mariadb on

F.

service mariadb reload

Question 21

A Linux administrator is troubleshooting connectivity issues and receives the following outputs:

python

Copy

$ ping comptia.org

ping: comptia.org: Temporary failure in name resolution

$ ping 104.18.17.29

64 bytes from 104.18.17.29: icmp_seq=1 ttl=63 time=31.4 ms

...

Which of the following describes the issue?

Options:

A.

A DNS has not been configured in the /etc/resolv.conf file

B.

A name server IP address has not been added in the /etc/protocols file

C.

The network interface is disabled

D.

A gateway IP address has not been configured on the network interface's configuration file

Question 22

A systems administrator needs to remove a disk from a Linux server. The disk size is 500G, and it is the only one that size on that machine. Which of the following commands can the

administrator use to find the corresponding device name?

Options:

A.

fdisk -V

B.

partprobe -a

C.

lsusb -t

D.

lsscsi -s

Question 23

A Linux administrator is attempting to capture all network traffic coming to the server from the 10.0.6.5 IP address. Which of the following commands should the administrator run on the server to achieve the goal?

Options:

A.

tcpdump ip 10.0.6.5

B.

tcpdump net 10.0.6.5

C.

tcpdump host 10.0.6.5

D.

tcpdump addr 10.0.6.5

Question 24

An administrator started a long-running process in the foreground that needs to continue without interruption. Which of the following keystrokes should the administrator use to continue running the process in the background?

Options:

A.

bg

B.

bg

C.

jobs -1

D.

bg &

Question 25

A Linux systems administrator has applied the necessary configuration to allow both HTTP and HTTPS through the firewall. However, the host is not responding on either HTTP or HTTPS. Given the output below, what is the issue?

python-repl

Copy

firewall-cmd —list-all-zones

public (active)

...

services: ssh

...

internal

...

services: http https ssh

Which of the following best describes the reason the system is not responding on HTTP or HTTPS?

Options:

A.

The incorrect rules were configured on the firewall

B.

The interface has the incorrect routes configured

C.

The rules were added to the wrong zone

Question 26

A Linux administrator provisioned a new web server with custom administrative permissions for certain users. The administrator receives a report that user1 is unable to restart the Apache web service on this server. The administrator reviews the following output:

[ root@server ] # id user1

UID=1011 (user1) gid=1011 (USER1) groups=1011 (user1), 101 (www-data), 1120 (webadmin)

[ root@server ] # cat /etc/sudoers.d/custom.conf

user1 ALL=/usr/sbin/systemctl start httpd, /usr/sbin/systemctl stop httpd

webadmin ALL=NOPASSWD: /etc/init.d.httpd restart, /sbin/service httpd restart, /usr/sbin/apache2ctl restart

#%wheel ALL=(ALL) NOPASSWD: ALL

Which of the following would most likely resolve the issue while maintaining a least privilege security model?

Options:

A.

User1 should be added to the wheel group to manage the service.

B.

User1 should have "NOPASSWD:" after the "ALL=" in the custom. conf.

C.

The wheel line in the custom. conf file should be uncommented.

D.

Webadmin should be listed as a group in the custom. conf file.

Question 27

An administrator wants to execute a long-running script in the terminal while troubleshooting another issue. Which of the following options will achieve this goal?

Options:

A.

bash script.sh &

B.

source script.sh

C.

sh script.sh | jobs

D.

nice -10 ./script.sh

Question 28

A Linux administrator is configuring a log collector agent to monitor logs in /var/log/collector. The agent is reporting that it cannot write to the directory. The agent runs as the logger user account. The administrator runs a few commands and reviews the following output:

Output 1:

drwxr-xr-x. 1 root root 0 Oct 20:13 collector

Output 2:

file: /var/log/collector

owner: root

group: root

user::rwx

group::r-x

mask::rwx

other::r-x

Output 3:

uid=1010(logger) gid=1010(monitor) groups=1010(monitor)

Which of the following is the best way to resolve the issue?

Options:

A.

setfacl -Rm u:logger/var/log/collector

B.

usermod -aG root logger

C.

chmod 644 /var/log/collector

D.

chown -R logger/var/log

Question 29

A systems administrator wants to leverage their password-protected SSH key to connect to multiple servers without entering their password every time. Which of the following commands should the administrator use?

Options:

A.

ssh-copy-id

B.

ssh-agent

C.

ssh-add

D.

ssh-keygen

Question 30

A Linux administrator intends to start using KVM on a Linux server. Which of the following commands will allow the administrator to load the KVM module as

well as any related dependencies?

Options:

A.

modprobe kvm

B.

insmod kvm

C.

depmod kvm

D.

hotplug kvm

Question 31

A systems administrator created a user cron to run a scheduled database backup cronjob on the server at 1 a.m. every day. The following is the cronjob syntax:

0 1 * * * /bin/sh backup.sh

The backups, however, are not being created. When checking the crontab file, the administrator sees the following error:

/var/spool/cron/crontab/cron: Permission denied

Which of the following will permit the cronjob to execute?

Options:

A.

Creating the file cron.allow and adding user cron to it

B.

Giving cron ownership of the file /usr/bin/crontab

C.

Running sudo cron restart to activate the cronjob

D.

Running sudo crontab -u cron -e to edit the file with sudo

Question 32

A systems administrator is deploying a web server using the following code:

pgsql

name "Web Server"

description "The role contains nodes, which act as a web server"

run_list "recipe[ntp]"

default_attributes "ntp" => {

"ntpdate" => {

"disable" => true

}

}

Which of the following technologies is the administrator using to create this web server?

Options:

A.

Chef

B.

Ansible

C.

Puppet

D.

Terraform

Question 33

A Linux administrator needs to create a symlink for /usr/local/bin/app-a, which was installed in /usr/local/share/app-a. Which of the following commands should the administrator use?

Options:

A.

In -s /usr/local/bin/app-a /usr/local/share/app-a

B.

mv -f /usr/local/share/app-a /usr/local/bin/app-a

C.

cp -f /usr/local/share/app-a /usr/local/bin/app-a

D.

rsync -a /usr/local/share/app-a /usr/local/bin/app-a

Question 34

The group owner of the / home/ test directory would like to preserve all group permissions on files created in the directory. Which of the following

commands should the group owner execute?

Options:

A.

chmod g+s /home/test

B.

chgrp test /home/test

C.

chmod 777 /home/test

D.

chown —hR test /home/test

Question 35

An administrator set up a new user account called "test". However, the user is unable to change their password. Given the following output:

as

Which of the following is the most likely cause of this issue?

Options:

A.

The SUID bit is missing on the /bin/passwd file.

B.

The password provided by the user "test" does not meet complexity requirements.

C.

The user "test" already changed the password today.

D.

The password has been disabled for user "test".

Question 36

A systems administrator is gathering information about a file type and the contents of a file. Which of the following commands should the administrator use to accomplish this task?

Options:

A.

file filename

B.

touch filename

C.

grep filename

D.

lsof filename

Question 37

A developer wants to ensure that all files and folders created inside a shared folder named /GroupOODEV inherit the group name of the parent folder. Which of the following commands will help achieve this goal?

Options:

A.

chmod g+X / GroupOODEV/

B.

chmod g+W / GroupOODEV/

C.

chmod g+r / GroupOODEV/

D.

chmod g+s / GroupOODEV/

Question 38

An administrator created an initial Git repository and uploaded the first files. The administrator sees the following when listing the repository:

The administrator notices the file . DS STORE should not be included and deletes it from the online repository. Which of the following should the administrator run from the root of the local repository before the next commit to ensure the file is not uploaded again in future commits?

Options:

A.

rm -f .DS STORE && git push

B.

git fetch && git checkout .DS STORE

C.

rm -f .DS STORE && git rebase origin main

D.

echo .DS STORE >> .gitignore

Question 39

An administrator changed the default port of an SSH server to 2222 on myhost, and clients are not able to connect. The administrator runs some commands and receives the following output:

vbnet

Copy code

$ ssh -p 2222 myhost

ssh:connect to host myhost on port 2222: No route to host

Which of the following commands should be run on myhost?

Options:

A.

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

B.

firewall-cmd --zone=public --add-port=2222

C.

iptables --zone=public --add-service=ssh

D.

iptables --zone=public --add-port=2222

Question 40

A Linux systems administrator wants to validate the network interfaces configuration and status on a Linux server. Which of the following commands should the administrator use to display the information for interface eth3 including status, IP address, subnet mask, and configuration?

Options:

A.

ip list interface eth3

B.

ip addr show dev eth3

C.

ip show eth3

D.

ip config eth3

Question 41

A Linux administrator is troubleshooting an SSHD issue on a server. Users are receiving error messages stating the connection is refused. Which of the following commands should be used to verify whether the service is listening?

Options:

A.

nslookup

B.

route

C.

netstat

D.

ifconfig

Question 42

NO: 12:

A network administrator issues the dig command and receives an NXDOMAIN response. Which of the following files should the administrator check first?

Options:

A.

/etc/resolv.conf

B.

/etc/hosts

C.

/etc/sysconfig/network-scripts

D.

/etc/nsswitch.conf

Question 43

An administrator needs to allow remote administrative access to a Linux server only to employees who are using the authorized private key. Which of the following options should the administrator set in the SSHD configuration file to achieve the goal?

Options:

A.

AuthorizedKeysCommand sudo

B.

PermitRootLogin prohibit-password

C.

AuthorizedKeysCommandUser root

D.

PasswordAuthentication no

Question 44

A Linux administrator needs to list the packages that are currently installed on a server. Which of the following commands should the administrator use?

Options:

A.

snap install list

B.

snap list

C.

snap show

D.

snap packages

Question 45

A systems administrator needs to disable root login for SSH. Which of the following commands should the administrator use?

Options:

A.

touch /etc/ssh/sshd_config | awk 's/PermitRootLoginX yes/PermitRootLoginX no/'

B.

sed -i 's/PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config

C.

touch /etc/ssh/sshd_config | print* 1PermitRootLogin/PermitRootLogin no/'

D.

cat /etc/ssh/sshd_config | grep 's/PermitRootLogin yes/PermitRootLogin no/'

Question 46

The administrator comptia is not able to perform privileged functions on a newly deployed system. Given the following command outputs:

Which of the following is the reason that the administrator is unable to perform the assigned duties?

Options:

A.

The administrator needs a password reset.

B.

The administrator is not a part of the correct group.

C.

The administrator did not update the sudo database.

D.

The administrator's credentials need to be more complex.

Question 47

Which of the following is the main purpose of SSO?

Options:

A.

To allow a user to authenticate once and have access to multiple applications or systems without having to log in again

B.

To add an extra layer of protection, reducing the risk of unauthorized access, requiring more than just a password to access

C.

To be an essential component for managing authentication, authorization, and identity information

D.

To serve as an information protection mechanism that protects identities with administrative access

Question 48

A systems administrator wants to list all local account names and their respective UIDs. Which of the following commands will provide output containing this information?

Options:

A.

cut -c: -f3,1 /etc/passwd

B.

cut -d: -s2,3 /etc/passwd

C.

cut -d: -f1,3 /etc/passwd

D.

cut -n: -f1,2 /etc/passwd

Question 49

A Linux administrator needs to check extended permissions applied to the directory test. Which of the following commands should the administrator use to help with this task?

Options:

A.

getsebool test/

B.

getenforce test/

C.

getfacl test/

D.

ls -al test/

Question 50

A new disk was presented to a server as /dev/ sdd. The systems administrator needs to check if a partition table is on that disk. Which of the following commands can show this information?

Options:

A.

Isscsi

B.

fdisk

C.

blkid

D.

partprobe

Question 51

A systems administrator wants to delete app . conf from a Git repository. Which of the following commands will delete the file?

Options:

A.

git tag app. conf

B.

git commit app . conf

C.

git checkout app . conf

D.

git rm app. conf

Question 52

A Linux administrator reviews a set of log output files and needs to identify files that contain any occurrence of the word denied. All log files containing entries in uppercase or lowercase letters should be included in the list. Which of the following commands should the administrator use to accomplish this task?

Options:

A.

find . -type f -print | xrags grep -ln denied

B.

find . -type f -print | xrags grep -nv denied

C.

find . -type f -print | xrags grep -wL denied

D.

find . -type f -print | xrags grep -li denied

Question 53

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?

Options:

A.

SQL

B.

YAML

C.

HTML

D.

JSON

Question 54

After starting an Apache web server, the administrator receives the following error:

Apr 23 localhost.localdomain httpd 4618] : (98) Address already in use: AH00072: make_sock: could not bind to address [: :]80

Which of the following commands should the administrator use to further trou-bleshoot this issue?

Options:

A.

Ss

B.

Ip

C.

Dig

D.

Nc

Question 55

A Linux administrator needs to expand a volume group using a new disk. Which of the following options presents the correct sequence of commands to accomplish the task?

Options:

A.

partprobevgcreatelvextend

B.

lvcreatefdiskpartprobe

C.

fdiskpartprobemkfs

D.

fdiskpvcreatevgextend

Question 56

A systems administrator received a notification that a system is performing slowly. When running the top command, the systems administrator can see the following values:

Which of the following commands will the administrator most likely run NEXT?

Options:

A.

vmstat

B.

strace

C.

htop

D.

lsof

Question 57

In order to copy data from another VLAN, a systems administrator wants to temporarily assign IP address 10.0.6 5/24 to the newly added network interface enp1s0f1. Which of the following commands should the administrator run to achieve the goal?

Options:

A.

ip addr add 10.0.6.5/24 dev enpls0f1

B.

echo "IPV4_ADDRESS=10.0.6.5/24" > /etc/sysconfig/network-scripts/ifcfg-enplsOfl

C.

ifconfig 10.0.6.5/24 enpsIs0f1

D.

nmcli conn add lpv4.address-10.0.6.5/24 ifname enpls0f1

Question 58

One leg of an LVM-mirrored volume failed due to the underlying physical volume, and a systems administrator is troubleshooting the issue. The following output has been provided:

Given this scenario, which of the following should the administrator do to recover this volume?

Options:

A.

Reboot the server. The volume will automatically go back to linear mode.

B.

Replace the failed drive and reconfigure the mirror.

C.

Reboot the server. The volume will revert to stripe mode.

D.

Recreate the logical volume.

Question 59

Which of the following can be used as a secure way to access a remote termi-nal?

Options:

A.

TFTP

B.

SSH

C.

SCP

D.

SFTP

Question 60

Which of the following enables administrators to configure and enforce MFA on a Linux system?

Options:

A.

Kerberos

B.

SELinux

C.

PAM

D.

PKI

Question 61

A DevOps engineer wants to allow the same Kubernetes container configurations to be deployed in development, testing, and production environments. A key requirement is that the containers should be configured so that developers do not have to statically configure custom, environment-specific locations. Which of the following should the engineer use to meet this requirement?

Options:

A.

Custom scheduler

B.

Node affinity

C.

Overlay network

D.

Ambassador container

Question 62

A Linux administrator is configuring a two-node cluster and needs to be able to connect the nodes to each other using SSH keys from the root account. Which of the following commands will accomplish this task?

Options:

A.

[root@nodea ssh —i ~/ . ssh/±d rsa root@nodeb

B.

[root@nodea scp -i . ssh/id rsa root@nodeb

C.

[root@nodea ssh—copy-id —i .ssh/id rsa root@nodeb

D.

[root@nodea # ssh add -c ~/ . ssh/id rsa root@nodeb

E.

[root@nodea # ssh add -c ~/. ssh/id rsa root@nodeb

Question 63

A Linux administrator modified the SSH configuration file. Which of the following commands should be used to apply the configuration changes?

Options:

A.

systemct1 stop sshd

B.

systemct1 mask sshd

C.

systemct1 reload sshd

D.

systemct1 start sshd

Question 64

Using AD Query, the security gateway connections to the Active Directory Domain Controllers using what protocol?

Options:

A.

Windows Management Instrumentation (WMI)

B.

Hypertext Transfer Protocol Secure (HTTPS)

C.

Lightweight Directory Access Protocol (LDAP)

D.

Remote Desktop Protocol (RDP)

Question 65

A Linux systems administrator is configuring a new filesystem that needs the capability to be mounted persistently across reboots. Which of the following commands will accomplish this task? (Choose two.)

Options:

A.

df -h /data

B.

mkfs.ext4 /dev/sdc1

C.

fsck /dev/sdc1

D.

fdisk -l /dev/sdc1

E.

echo "/data /dev/sdc1 ext4 defaults 0 0" >> /etc/fstab

F.

echo "/dev/sdc1 /data ext4 defaults 0 0" >> /etc/fstab

Question 66

While inspecting a recently compromised Linux system, the administrator identified a number of processes that should not have been running:

Which of the following commands should the administrator use to terminate all of the identified processes?

Options:

A.

pkill -9 -f "upload*.sh"

B.

kill -9 "upload*.sh"

C.

killall -9 -upload*.sh"

D.

skill -9 "upload*.sh"

Question 67

A systems administrator is tasked with mounting a USB drive on a system. The USB drive has a single partition, and it has been mapped by the system to the device /dev/sdb. Which of the following commands will mount the USB to /media/usb?

Options:

A.

mount /dev/sdb1 /media/usb

B.

mount /dev/sdb0 /media/usb

C.

mount /dev/sdb /media/usb

D.

mount -t usb /dev/sdb1 /media/usb

Question 68

In which of the following filesystems are system logs commonly stored?

Options:

A.

/var

B.

/tmp

C.

/etc

D.

/opt

Question 69

A systems administrator needs to verify whether the built container has the app.go file in its root directory. Which of the following can the administrator use to verify the root directory has this file?

Options:

A.

docker image inspect

B.

docker container inspect

C.

docker exec ls

D.

docker ps

Question 70

Joe, a user, is unable to log in to the Linux system. Given the following output:

Which of the following commands would resolve the issue?

Options:

A.

usermod -s /bin/bash joe

B.

pam_tally2 -u joe -r

C.

passwd -u joe

D.

chage -E 90 joe

Question 71

A systems administrator is compiling a report containing information about processes that are listening on the network ports of a Linux server. Which of the following commands will allow the administrator to obtain the needed information?

Options:

A.

ss -pint

B.

tcpdump -nL

C.

netstat -pn

D.

lsof -It

Question 72

A database administrator requested the installation of a custom database on one of the servers. Which of the following should the Linux administrator configure so the requested packages can be installed?

Options:

A.

/etc/yum.conf

B.

/etc/ssh/sshd.conf

C.

/etc/yum.repos.d/db.repo

D.

/etc/resolv.conf

Question 73

A Linux administrator has physically added a new RAID adapter to a system. Which of the following commands should the Linux administrator run to confirm that the device has been recognized? (Select TWO).

Options:

A.

rmmod

B.

Is -11 /etc

C.

Ishw —class disk

D.

pvdisplay

E.

rmdir /dev

F.

dmesg

Question 74

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

Options:

A.

Virtual private network

B.

Sidecar pod

C.

Overlay network

D.

Service mesh

Question 75

During a security scan, the password of an SSH key file appeared to be too weak and was cracked. Which of the following commands would allow a user to choose a stronger password and set it on the existing SSH key file?

Options:

A.

passwd

B.

ssh

C.

ssh-keygen

D.

pwgen

Question 76

A systems administrator checked out the code from the repository, created a new branch, made changes to the code, and then updated the main branch. The systems administrator wants to ensure that the Terraform state files do not appear in the main branch. Which of following should the administrator use to meet this requirement?

Options:

A.

clone

B.

gitxgnore

C.

get

D.

.ssh

Question 77

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?

Options:

A.

grep -i auto /etc/systemd/journald.conf && systemct1 restart systemd-journald.service

B.

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

C.

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

D.

journalctl --list-boots && systemct1 restart systemd-journald.service

Question 78

A Linux administrator has been tasked with installing the most recent versions of packages on a RPM-based OS. Which of the following commands will accomplish this task?

Options:

A.

apt-get upgrade

B.

rpm -a

C.

yum updateinfo

D.

dnf update

E.

yum check-update

Question 79

A cloud engineer needs to check the link status of a network interface named eth1 in a Linux server. Which of the following commands can help to achieve the goal?

Options:

A.

ifconfig hw eth1

B.

netstat -r eth1

C.

ss -ti eth1

D.

ip link show eth1

Question 80

A Linux administrator is providing a new Nginx image from the registry to local cache. Which of the following commands would allow this to happen?

Options:

A.

docker pull nginx

B.

docker attach nginx

C.

docker commit nginx

D.

docker import nginx

Question 81

Which of the following data structures is written in JSON?

A)

B)

C)

D)

as

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 82

A user created the following script file:

# ! /bin/bash

# FILENAME: /home/user/ script . sh

echo "hello world"

exit 1

However, when the user tried to run the script file using the command "script . sh, an error returned indicating permission was denied. Which of the follow-ing should the user execute in

order for the script to run properly?

Options:

A.

chmod u+x /home/user/script . sh

B.

chmod 600 /home/user/script . sh

C.

chmod /home/user/script . sh

D.

chmod 0+r /horne/user/script. sh

Question 83

A systems administrator wants to check for running containers. Which of the following commands can be used to show this information?

Options:

A.

docker pull

B.

docker stats

C.

docker ps

D.

docker list

Question 84

A developer needs to launch an Nginx image container, name it Web001, and ex-pose port 8080 externally while mapping to port 80 inside the container. Which of the following commands will accomplish this task?

Options:

A.

docker exec —it -p 8080: 80 ——name Web001 nginx

B.

docker load -it -p 8080:80 ——name Web001 nginx

C.

docker run -it -P 8080:80 ——name Web001 nginx

D.

docker pull -it -p 8080:80 —name Web00l nginx

Question 85

A Linux administrator is adding a new configuration file to a Git repository. Which of the following describes the correct order of Git commands to accomplish the task successfully?

Options:

A.

pull -> push -> add -> checkout

B.

pull -> add -> commit -> push

C.

checkout -> push -> add -> pull

D.

pull -> add -> push -> commit

Question 86

A Linux systems administrator is troubleshooting an I/O latency on a single CPU server. The administrator runs a top command and receives the following output:

%Cpu(s): 0.2 us, 33.1 sy, 0.0 ni, 0.0 id, 52.4 wa, 0.0 hi, 0.2 si, 0.0 st

Which of the following is correct based on the output received from the exe-cuted command?

Options:

A.

The server's CPU is taking too long to process users' requests.

B.

The server's CPU shows a high idle-time value.

C.

The server's CPU is spending too much time waiting for data inputs.

D.

The server's CPU value for the time spent on system processes is low.

Question 87

A Linux administrator was notified that a virtual server has an I/O bottleneck. The Linux administrator analyzes the following output:

Given there is a single CPU in the sever, which of the following is causing the slowness?

Options:

A.

The system is running out of swap space.

B.

The CPU is overloaded.

C.

The memory is exhausted.

D.

The processes are paging.

Question 88

A senior Linux administrator has created several scripts that will be used to install common system applications. These scripts are published to a reposito-ry to share with the systems team. A junior Linux administrator needs to re-trieve the scripts and make them available on a local workstation. Which of the following Git commands should the junior Linux administrator use to accom-plish this task?

Options:

A.

fetch

B.

checkout

C.

clone

D.

branch

Question 89

A Linux administrator is alerted to a storage capacity issue on a server without a specific mount point or directory. Which of the following commands would be MOST helpful for troubleshooting? (Choose two.)

Options:

A.

parted

B.

df

C.

mount

D.

du

E.

fdisk

F.

dd

G.

ls

Question 90

A Linux system is failing to boot. The following error is displayed in the serial console:

[[1;33mDEPEND[Om] Dependency failed for /data.

[[1;33mDEPEND[Om] Dependency failed for Local File Systems

...

Welcome to emergency mode! After logging in, type "journalctl -xb" to viewsystem logs, "systemct1 reboot" to reboot, "systemct1 default" to try again to boot into default mode.

Give root password for maintenance

(or type Control-D to continue}

Which of the following files will need to be modified for this server to be able to boot again?

Options:

A.

/etc/mtab

B.

/dev/sda

C.

/etc/fstab

D.

/ete/grub.conf

Question 91

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?

Options:

A.

fg

B.

su

C.

bg

D.

ed

Question 92

A Linux administrator found many containers in an exited state. Which of the following commands will allow the administrator to clean up the containers in an exited state?

Options:

A.

docker rm --all

B.

docker rm $(docker ps -aq)

C.

docker images prune *

D.

docker rm --state exited

Question 93

User1 is a member of the accounting group. Members of this group need to be able to execute but not make changes to a script maintained by User2. The script should not be accessible to other users or groups. Which of the following will give proper access to the script?

Options:

A.

chown user2:accounting script.shchmod 750 script.sh

B.

chown user1:accounting script.shchmod 777 script.sh

C.

chown accounting:user1 script.shchmod 057 script.sh

D.

chown user2:accounting script.shchmod u+x script.sh

Question 94

A Linux systems administrator receives reports from various users that an application hosted on a server has stopped responding at similar times for several days in a row. The administrator logs in to the system and obtains the following output:

Output 1:

Output 2:

Output 3:

Which of the following should the administrator do to provide the BEST solution for the reported issue?

Options:

A.

Configure memory allocation policies during business hours and prevent the Java process from going into a zombie state while the server is idle.

B.

Configure a different nice value for the Java process to allow for more users and prevent the Java process from restarting during business hours.

C.

Configure more CPU cores to allow for the server to allocate more processing and prevent the Java process from consuming all of the available resources.

D.

Configure the swap space to allow for spikes in usage during peak hours and prevent the Java process from stopping due to a lack of memory.

Question 95

A developer reported an incident involving the application configuration file /etc/httpd/conf/httpd.conf that is missing from the server. Which of the following identifies the RPM package that installed the configuration file?

Options:

A.

rpm -qf /etc/httpd/conf/httpd.conf

B.

rpm -ql /etc/httpd/conf/httpd.conf

C.

rpm —query /etc/httpd/conf/httpd.conf

D.

rpm -q /etc/httpd/conf/httpd.conf

Question 96

A Linux engineer needs to create a custom script, cleanup.sh, to run at boot as part of the system services. Which of the following processes would accomplish this task?

Options:

A.

Create a unit file in the /etc/default/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

B.

Create a unit file in the /etc/ske1/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

C.

Create a unit file in the /etc/systemd/system/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

D.

Create a unit file in the /etc/sysctl.d/ directory.systemct1 enable cleanupsystemct1 is-enabled cleanup

Question 97

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?

Options:

A.

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

B.

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

C.

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

Question 98

A systems administrator is receiving tickets from users who cannot reach the application app that should be listening on port 9443/tcp on a Linux server.

To troubleshoot the issue, the systems administrator runs netstat and receives the following output:

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

Options:

A.

The IP address 0.0.0.0 is not valid.

B.

The application is listening on the loopback interface.

C.

The application is listening on port 1234.

D.

The application is not running.

Question 99

A junior systems administrator has just generated public and private authentication keys for passwordless login. Which of the following files will be moved to the remote servers?

Options:

A.

id_dsa.pem

B.

id_rsa

C.

id_ecdsa

D.

id_rsa.pub

Question 100

A Linux administrator recently downloaded a software package that is currently in a compressed file. Which of the following commands will extract the files?

Options:

A.

unzip -v

B.

bzip2 -z

C.

gzip

D.

funzip

Question 101

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?

Options:

A.

route -i etho -p add 10.0.213.5 10.0.5.1

B.

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

C.

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

D.

ip route add 10.0.213.5/32 via 10.0.5.1 dev eth0

Question 102

A cloud engineer is installing packages during VM provisioning. Which of the following should the engineer use to accomplish this task?

Options:

A.

Cloud-init

B.

Bash

C.

Docker

D.

Sidecar

Question 103

Based on an organization’s new cybersecurity policies, an administrator has been instructed to ensure that, by default, all new users and groups that are created fall within the specified values below.

To which of the following configuration files will the required changes need to be made?

Options:

A.

/etc/login.defs

B.

/etc/security/limits.conf

C.

/etc/default/useradd

D.

/etc/profile

Question 104

A Linux administrator is tasked with adding users to the system. However, the administrator wants to ensure the users’ access will be disabled once the project is over. The expiration date should be 2021-09-30. Which of the following commands will accomplish this task?

Options:

A.

sudo useradd -e 2021-09-30 Project_user

B.

sudo useradd -c 2021-09-30 Project_user

C.

sudo modinfo -F 2021-09-30 Project_uses

D.

sudo useradd -m -d 2021-09-30 Project_user

Question 105

A Linux administrator created a new file system. Which of the following files must be updated to ensure the filesystem mounts at boot time?

Options:

A.

/etc/sysctl

B.

/etc/filesystems

C.

/etc/fstab

D.

/etc/nfsmount.conf

Question 106

A Linux administrator booted up the server and was presented with a non-GUI terminal. The administrator ran the command systemct1 isolate graphical.target and rebooted the system by running systemct1 reboot, which fixed the issue. However, the next day the administrator was presented again with a non-GUI terminal. Which of the following is the issue?

Options:

A.

The administrator did not reboot the server properly.

B.

The administrator did not set the default target to basic.target.

C.

The administrator did not set the default target to graphical.target.

D.

The administrator did not shut down the server properly.

Question 107

A Linux administrator wants to find out whether files from the wget package have been altered since they were installed. Which of the following commands will provide the correct information?

Options:

A.

rpm -i wget

B.

rpm -qf wget

C.

rpm -F wget

D.

rpm -V wget

Question 108

A Linux engineer set up two local DNS servers (10.10.10.10 and 10.10.10.20) and was testing email connectivity to the local mail server using the mail command on a local machine when the following error appeared:

The local machine DNS settings are:

Which of the following commands could the engineer use to query the DNS server to get mail server information?

Options:

A.

dig @example.com 10.10.10.20 a

B.

dig @10.10.10.20 example.com mx

C.

dig @example.com 10.10.10.20 ptr

D.

dig @10.10.10.20 example.com ns

Question 109

A Linux system is getting an error indicating the root filesystem is full. Which of the following commands should be used by the systems administrator to resolve this issue? (Choose three.)

Options:

A.

df -h /

B.

fdisk -1 /dev/sdb

C.

growpart /dev/mapper/rootvg-rootlv

D.

pvcreate /dev/sdb

E.

lvresize –L +10G -r /dev/mapper/rootvg-rootlv

F.

lsblk /dev/sda

G.

parted -l /dev/mapper/rootvg-rootlv

Question 110

A Linux administrator is troubleshooting an issue in which an application service failed to start on a Linux server. The administrator runs a few commands and gets the following outputs:

Based on the above outputs, which of the following is the MOST likely action the administrator should take to resolve this issue?

Options:

A.

Enable the logsearch.service and restart the service.

B.

Increase the TimeoutStartUSec configuration for the logsearch.sevice.

C.

Update the OnCalendar configuration to schedule the start of the logsearch.service.

D.

Update the KillSignal configuration for the logsearch.service to use TERM.

Question 111

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?

Options:

A.

The workstation has the wrong IP settings.

B.

The sshd service is disabled.

C.

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

D.

The server has an incorrect default gateway configuration.

Question 112

To harden one of the servers, an administrator needs to remove the possibility of remote administrative login via the SSH service. Which of the following should the administrator do?

Options:

A.

Add the line DenyUsers root to the /etc/hosts.deny file.

B.

Set PermitRootLogin to no in the /etc/ssh/sshd_config file.

C.

Add the line account required pam_nologin. so to the /etc/pam.d/sshd file.

D.

Set PubKeyAuthentication to no in the /etc/ssh/ssh_config file.

Question 113

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?

Options:

A.

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

B.

sysctl -w net.ipv4.ip_forward=1

C.

firewall-cmd --enable ipv4_forwarding

D.

systemct1 start ipv4_forwarding

Question 114

A systems administrator is investigating why one of the servers has stopped connecting to the internet.

Which of the following is causing the issue?

Options:

A.

The DNS address has been commented out in the configuration file.

B.

The search entry in the /etc/resolv.conf file is incorrect.

C.

Wired connection 1 is offline.

D.

No default route is defined.

Question 115

After installing some RPM packages, a systems administrator discovers the last package that was installed was not needed. Which of the following commands can be used to remove the package?

Options:

A.

dnf remove packagename

B.

apt-get remove packagename

C.

rpm -i packagename

D.

apt remove packagename

Question 116

An administrator installed an application from source into /opt/operations1/ and has received numerous reports that users are not able to access the application without having to use the full path /opt/operations1/bin/*. Which of the following commands should be used to resolve this issue?

Options:

A.

echo 'export PATH=$PATH:/opt/operations1/bin' >> /etc/profile

B.

echo 'export PATH=/opt/operations1/bin' >> /etc/profile

C.

echo 'export PATH=$PATH/opt/operations1/bin' >> /etc/profile

D.

echo 'export $PATH:/opt/operations1/bin' >> /etc/profile

Question 117

A systems administrator wants to back up the directory /data and all its contents to /backup/data on a remote server named remote. Which of the following commands will achieve the desired effect?

Options:

A.

scp -p /data remote:/backup/data

B.

ssh -i /remote:/backup/ /data

C.

rsync -a /data remote:/backup/

D.

cp -r /data /remote/backup/

Question 118

A Linux system is failing to boot with the following error:

Which of the following actions will resolve this issue? (Choose two.)

Options:

A.

Execute grub-install --root-directory=/mnt and reboot.

B.

Execute grub-install /dev/sdX and reboot.

C.

Interrupt the boot process in the GRUB menu and add rescue to the kernel line.

D.

Fix the partition modifying /etc/default/grub and reboot.

E.

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

F.

Boot the system on a LiveCD/ISO.

Question 119

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.)

Options:

A.

wget

B.

ssh-keygen

C.

ssh-keyscan

D.

ssh-copy-id

E.

ftpd

F.

scp

Question 120

A Linux administrator is tasked with creating resources using containerization. When deciding how to create this type of deployment, the administrator identifies some key features, including portability, high availability, and scalability in production. Which of the following should the Linux administrator choose for the new design?

Options:

A.

Docker

B.

On-premises systems

C.

Cloud-based systems

D.

Kubernetes

Question 121

A systems administrator is tasked with creating a cloud-based server with a public IP address.

as

Which of the following technologies did the systems administrator use to complete this task?

Options:

A.

Puppet

B.

Git

C.

Ansible

D.

Terraform

Question 122

A cloud engineer is asked to copy the file deployment.yaml from a container to the host where the container is running. Which of the following commands can accomplish this task?

Options:

A.

docker cp container_id/deployment.yaml deployment.yaml

B.

docker cp container_id:/deployment.yaml deployment.yaml

C.

docker cp deployment.yaml local://deployment.yaml

D.

docker cp container_id/deployment.yaml local://deployment.yaml

Question 123

Which of the following commands will display the operating system?

Options:

A.

uname -n

B.

uname -s

C.

uname -o

D.

uname -m

Question 124

A Linux administrator is scheduling a system job that runs a script to check available disk space every hour. The Linux administrator does not want users to be able to start the job. Given the following:

The Linux administrator attempts to start the timer service but receives the following error message:

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Which of the following is MOST likely the reason the timer will not start?

Options:

A.

The checkdiskspace.timer unit should be enabled via systemct1.

B.

The timers.target should be reloaded to get the new configuration.

C.

The checkdiskspace.timer should be configured to allow manual starts.

D.

The checkdiskspace.timer should be started using the sudo command.

Question 125

A junior administrator is trying to set up a passwordless SSH connection to one of the servers. The administrator follows the instructions and puts the key in the authorized_key file at the server, but the administrator is still asked to provide a password during the connection.

Given the following output:

Which of the following commands would resolve the issue and allow an SSH connection to be established without a password?

Options:

A.

restorecon -rv .ssh/authorized_key

B.

mv .ssh/authorized_key .ssh/authorized_keys

C.

systemct1 restart sshd.service

D.

chmod 600 mv .ssh/authorized_key

Question 126

A systems administrator wants to be sure the sudo rules just added to /etc/sudoers are valid. Which of the following commands can be used for this task?

Options:

A.

visudo -c

B.

test -f /etc/sudoers

C.

sudo vi check

D.

cat /etc/sudoers | tee test

Question 127

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?

Options:

A.

df -i /oracle1

B.

fdisk -1 /dev/sdb1

C.

lsblk /dev/sdb1

D.

du -sh /oracle1

Question 128

A systems administrator needs to clone the partition /dev/sdc1 to /dev/sdd1. Which of the following commands will accomplish this task?

Options:

A.

tar -cvzf /dev/sdd1 /dev/sdc1

B.

rsync /dev/sdc1 /dev/sdd1

C.

dd if=/dev/sdc1 of=/dev/sdd1

D.

scp /dev/sdc1 /dev/sdd1

Question 129

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?

Options:

A.

hostnamectl status --no-ask-password

B.

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

C.

hostnamectl set-hostname Comptia-WebNode -H root@192.168.2.14

D.

hostnamectl set-hostname Comptia-WebNode --transient

Question 130

A Linux administrator is troubleshooting a memory-related issue. Based on the output of the commands:

Which of the following commands would address the issue?

Options:

A.

top -p 8321

B.

kill -9 8321

C.

renice -10 8321

D.

free 8321

Question 131

A Linux administrator needs to ensure that Java 7 and Java 8 are both locally available for developers to use when deploying containers. Currently only Java 8 is available. Which of the following commands should the administrator run to ensure both versions are available?

Options:

A.

docker image load java:7

B.

docker image pull java:7

C.

docker image import java:7

D.

docker image build java:7

Question 132

A Linux administrator needs to create a new cloud.cpio archive containing all the files from the current directory. Which of the following commands can help to accomplish this task?

Options:

A.

ls | cpio -iv > cloud.epio

B.

ls | cpio -iv < cloud.epio

C.

ls | cpio -ov > cloud.cpio

D.

ls cpio -ov < cloud.cpio

Question 133

Which of the following is a function of a bootloader?

Options:

A.

It initializes all the devices that are required to load the OS.

B.

It mounts the root filesystem that is required to load the OS.

C.

It helps to load the different kernels to initiate the OS startup process.

D.

It triggers the start of all the system services.

Question 134

Users report that connections to a MariaDB service are being closed unexpectedly. A systems administrator troubleshoots the issue and finds the following message in /var/log/messages:

Which of the following is causing the connection issue?

Options:

A.

The process mysqld is using too many semaphores.

B.

The server is running out of file descriptors.

C.

Something is starving the server resources.

D.

The amount of RAM allocated to the server is too high.

Question 135

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?

Options:

A.

restorecon .ssh/authorized_keys

B.

ssh_keygen -t rsa -o .ssh/authorized_keys

C.

chown root:root .ssh/authorized_keys

D.

chmod 600 .ssh/authorized_keys

Question 136

A Linux administrator was asked to run a container with the httpd server inside. This container should be exposed at port 443 of a Linux host machine while it internally listens on port 8443. Which of the following commands will accomplish this task?

Options:

A.

podman run -d -p 443:8443 httpd

B.

podman run -d -p 8443:443 httpd

C.

podman run –d -e 443:8443 httpd

D.

podman exec -p 8443:443 httpd

Question 137

A Linux administrator needs to redirect all HTTP traffic temporarily to the new proxy server 192.0.2.25 on port 3128. Which of the following commands will accomplish this task?

Options:

A.

iptables -t nat -D PREROUTING -p tcp --sport 80 -j DNAT - -to-destination 192.0.2.25:3128

B.

iptables -t nat -A PREROUTING -p top --dport 81 -j DNAT –-to-destination 192.0.2.25:3129

C.

iptables -t nat -I PREROUTING -p top --sport 80 -j DNAT –-to-destination 192.0.2.25:3129

D.

iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT –-to-destination 192.0.2.25:3128

Question 138

A systems administrator has been tasked with disabling the nginx service from the environment to prevent it from being automatically and manually started. Which of the following commands will accomplish this task?

Options:

A.

systemct1 cancel nginx

B.

systemct1 disable nginx

C.

systemct1 mask nginx

D.

systemct1 stop nginx

Question 139

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--. ?

Options:

A.

chmod 755 filename.log

B.

chmod 640 filename.log

C.

chmod 740 filename.log

D.

chmod 744 filename.log

Question 140

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?

Options:

A.

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

B.

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

C.

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

D.

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

Question 141

As a Systems Administrator, to reduce disk space, you were tasked to create a shell script that does the following:

Add relevant content to /tmp/script.sh, so that it finds and compresses rotated files in /var/log without recursion.

INSTRUCTIONS

Fill the blanks to build a script that performs the actual compression of rotated log files.

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

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Options:

Question 142

A Linux administrator is troubleshooting the root cause of a high CPU load and average.

Which of the following commands will permanently resolve the issue?

Options:

A.

renice -n -20 6295

B.

pstree -p 6295

C.

iostat -cy 1 5

D.

kill -9 6295

Question 143

A systems administrator is checking the system logs. The administrator wants to look at the last 20 lines of a log. Which of the following will execute the command?

Options:

A.

tail -v 20

B.

tail -n 20

C.

tail -c 20

D.

tail -l 20

Question 144

When trying to log in remotely to a server, a user receives the following message:

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The server administrator is investigating the issue on the server and receives the following outputs:

as

Which of the following is causing the issue?

Options:

A.

The wrong permissions are on the user’s home directory.

B.

The account was locked out due to three failed logins.

C.

The user entered the wrong password.

D.

The user has the wrong shell assigned to the account.

Question 145

A Linux administrator was tasked with deleting all files and directories with names that are contained in the sobelete.txt file. Which of the following commands will accomplish this task?

Options:

A.

xargs -f cat toDelete.txt -rm

B.

rm -d -r -f toDelete.txt

C.

cat toDelete.txt | rm -frd

D.

cat toDelete.txt | xargs rm -rf

Question 146

A systems administrator installed a new software program on a Linux server. When the systems administrator tries to run the program, the following message appears on the screen.

Which of the following commands will allow the systems administrator to check whether the system supports virtualization?

Options:

A.

dmidecode -s system-version

B.

lscpu

C.

sysctl -a

D.

cat /sys/device/system/cpu/possible

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