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Question # 4

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?

A.

Ss

B.

Ip

C.

Dig

D.

Nc

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Question # 5

A user reported issues when trying to log in to a Linux server. The following outputs were received:

Given the outputs above. which of the following is the reason the user is una-ble to log in to the server?

A.

User1 needs to set a long password.

B.

User1 is in the incorrect group.

C.

The user1 shell assignment incorrect.

D.

The user1 password is expired.

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Question # 6

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?

A.

fg

B.

su

C.

bg

D.

ed

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Question # 7

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?

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.

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Question # 8

The application team is having issues accessing their data in their /app filesystem. Given the following outputs:

Which of the following is the reason for this issue?

A.

The fllesystem was mounted incorrectly.

B.

The /etc/fstab configuration is wrong.

C.

A physical volume is missing.

D.

The data has been deleted.

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Question # 9

Rugged appliances are small appliances with ruggedized hardware and like Quantum Spark appliance they use which operating system?

A.

Centos Linux

B.

Gaia embedded

C.

Gaia

D.

Red Hat Enterprise Linux version 5

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Question # 10

Users have reported that the interactive sessions were lost on a Linux server. A Linux administrator verifies the server was switched to rescue.target mode for maintenance. Which of the following commands will restore the server to its usual target?

A.

telinit 0

B.

systemct1 reboot

C.

systemct1 get-default

D.

systemct1 emergency

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Question # 11

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.)

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

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Question # 12

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

A.

/var

B.

/tmp

C.

/etc

D.

/opt

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Question # 13

A systems administrator has been unable to terminate a process. Which of the following should the administrator use to forcibly stop the process?

A.

kill -1

B.

kill -3

C.

kill -15

D.

kill -HUP

E.

kill -TERM

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Question # 14

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?

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

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Question # 15

A systems administrator was tasked with assigning the temporary IP address/netmask 192.168.168.1/255.255.255.255 to the interface eth0 of a Linux server.

When adding the address, the following error appears:

# ip address add 192.168.168.1/33 dev eth0

Error: any valid prefix is expected rather than "192.168.168.1/33".

Based on the command and its output above, which of the following is the cause of the issue?

A.

The CIDR value /33 should be /32 instead.

B.

There is no route to 192.168.168.1/33.

C.

The interface eth0 does not exist.

D.

The IP address 192.168.168.1 is already in use.

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Question # 16

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?

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

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Question # 17

A systems administrator is notified that the mysqld process stopped unexpectedly. The systems administrator issues the following command:

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

The output of the command shows the following:

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

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

A.

free -h

B.

nc -v 127.0.0.1 3306

C.

renice -15 $( pidof mysql )

D.

lsblk

E.

killall -15

F.

vmstat -a 1 4

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Question # 18

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

A.

git tag app. conf

B.

git commit app . conf

C.

git checkout app . conf

D.

git rm app. conf

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Question # 19

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?

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.

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Question # 20

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?

A.

apt-get upgrade

B.

rpm -a

C.

yum updateinfo

D.

dnf update

E.

yum check-update

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Question # 21

Users have been unable to save documents to /home/tmp/temp and have been receiving the following error:

Path not found

A junior technician checks the locations and sees that /home/tmp/tempa was accidentally created instead of /home/tmp/temp. Which of the following commands should the technician use to fix this issue?

A.

cp /home/tmp/tempa /home/tmp/temp

B.

mv /home/tmp/tempa /home/tmp/temp

C.

cd /temp/tmp/tempa

D.

ls /home/tmp/tempa

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Question # 22

At what point is the Internal Certificate Authority (ICA) created?

A.

During the primary Security Management Server installation process.

B.

Upon creation of a certificate.

C.

When an administrator decides to create one.

D.

When an administrator initially logs into SmartConsole.

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Question # 23

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?

A.

clone

B.

gitxgnore

C.

get

D.

.ssh

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Question # 24

Which of the following commands is used to configure the default permissions for new files?

A.

setenforce

B.

sudo

C.

umask

D.

chmod

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Question # 25

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?

A.

fetch

B.

checkout

C.

clone

D.

branch

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Question # 26

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?

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

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Question # 27

A cloud engineer needs to block the IP address 192.168.10.50 from accessing a Linux server. Which of the following commands will achieve this goal?

A.

iptables -F INPUT -j 192.168.10.50 -m DROP

B.

iptables -A INPUT -s 192.168.10.30 -j DROP

C.

iptables -i INPUT --ipv4 192.168.10.50 -z DROP

D.

iptables -j INPUT 192.168.10.50 -p DROP

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Question # 28

A Linux engineer receives reports that files created within a certain group are being modified by users who are not group members. The engineer wants to reconfigure the server so that only file owners and group members can modify new files by default. Which of the following commands would accomplish this task?

A.

chmod 775

B.

umask. 002

C.

chactr -Rv

D.

chown -cf

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Question # 29

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?

A.

SQL

B.

YAML

C.

HTML

D.

JSON

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Question # 30

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

The Linux server has the following system properties

CPU: 4 vCPU

Memory: 50GB

Which of the following accurately describes this situation?

A.

The system is under CPU pressure and will require additional vCPUs

B.

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

C.

Too many users are currently logged in to the system

D.

The system requires more memory

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Question # 31

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

A.

TFTP

B.

SSH

C.

SCP

D.

SFTP

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Question # 32

The development team wants to prevent a file from being modified by all users in a Linux system, including the root account. Which of the following commands can be used to accomplish this objective?

A.

chmod / app/conf/file

B.

setenforce / app/ conf/ file

C.

chattr +i /app/conf/file

D.

chmod 0000 /app/conf/file

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Question # 33

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?

A.

vmstat

B.

strace

C.

htop

D.

lsof

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Question # 34

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

A.

systemct1 status

B.

systemct1 stop

C.

systemct1 reinstall

D.

systemct1 daemon-reload

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Question # 35

Due to performance issues on a server, a Linux administrator needs to termi-nate an unresponsive process. Which of the following commands should the

administrator use to terminate the process immediately without waiting for a graceful shutdown?

A.

kill -SIGKILL 5545

B.

kill -SIGTERM 5545

C.

kill -SIGHUP 5545

D.

kill -SIGINT 5545

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Question # 36

A systems administrator created a new Docker image called test. After building the image, the administrator forgot to version the release. Which of the following will allow the administrator to assign the v1 version to the image?

A.

docker image save test test:v1

B.

docker image build test:vl

C.

docker image tag test test:vl

D.

docker image version test:v1

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Question # 37

A systems administrator is customizing a new Linux server. Which of the following settings for umask would ensure that new files have the default permissions of -rw-r--r--?

A.

0017

B.

0027

C.

0038

D.

0640

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Question # 38

An application developer received a file with the following content:

##This is a sample Image ##

FROM ubuntu:18.04

MAINTAINER demohut@gtmail.com.hac

COPY . /app

RUN make /app

CMD python /app/app.py

RUN apt-get update

RUN apt-get install -y nginx

CMD ["echo","Image created"]

The developer must use this information to create a test bed environment and identify the image (myimage) as the first version for testing a new

application before moving it to production. Which of the following commands will accomplish this task?

A.

docker build -t myimage:1.0 .

B.

docker build -t myimage: .

C.

docker build -t myimage-1.0 .

D.

docker build -i myimage:1.0 .

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Question # 39

A systems administrator is enabling LUKS on a USB storage device with an ext4 filesystem format. The administrator runs dmesg and notices the following output:

Given this scenario, which of the following should the administrator perform to meet these requirements? (Select three).

A.

gpg /dev/sdcl

B.

pvcreate /dev/sdc

C.

mkfs . ext4 /dev/mapper/LUKSCJ001 - L ENCRYPTED

D.

umount / dev/ sdc

E.

fdisk /dev/sdc

F.

mkfs . vfat /dev/mapper/LUKS0001 — L ENCRYPTED

G.

wipefs —a/dev/sdbl

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Question # 40

A Linux systems administrator needs to copy files and directories from Server A to Server B. Which of the following commands can be used for this purpose? (Select TWO)

A.

rsyslog

B.

cp

C.

rsync

D.

reposync

E.

scp

F.

ssh

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Question # 41

An administrator needs to get network information from a group of statically assigned workstations before they are reconnected to the network. Which of the following should the administrator use to obtain this information?

A.

ip show

B.

ifcfg —a

C.

ifcfg —s

D.

i fname —s

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Question # 42

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?

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

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Question # 43

Following the migration from a disaster recovery site, a systems administrator wants a server to require a user to change credentials at initial login. Which of the following commands should

be used to ensure the aging attribute?

A.

chage -d 2 user

B.

chage -d 0 user

C.

chage -E 0 user

D.

chage -d 1 user

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Question # 44

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?

A.

docker image inspect

B.

docker container inspect

C.

docker exec ls

D.

docker ps

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Question # 45

The applications team is reporting issues when trying to access the web service hosted in a Linux system. The Linux systems administrator is reviewing the following outputs:

Output 1:

* httpd.service = The Apache HTTPD Server

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

Active: inactive (dead)

Docs: man:httpd(8) man:apachectl(8)

Output 2:

16:51:16 up 28 min, 1 user, load average: 0.00, 0.00, 0.07

Which of the following statements best describe the root cause? (Select two).

A.

The httpd service is currently started.

B.

The httpd service is enabled to auto start at boot time, but it failed to start.

C.

The httpd service was manually stopped.

D.

The httpd service is not enabled to auto start at boot time.

E.

The httpd service runs without problems.

F.

The httpd service did not start during the last server reboot.

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Question # 46

A Linux administrator needs to create a new user named user02. However, user02 must be in a different home directory, which is under /comptia/projects. Which of the following commands will accomplish this task?

A.

useradd -d /comptia/projects user02

B.

useradd -m /comptia/projects user02

C.

useradd -b /comptia/projects user02

D.

useradd -s /comptia/projects user02

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Question # 47

A server administrator has scheduled a cron job to run YUM updates on all servers without manual intervention, but kernel packages must be excluded from the updates at all times. Which of the following configuration files needs to be modified to make these changes persistent?

A.

/etc/yum.conf

B.

/etc/dnf/dnf.conf

C.

/etc/yum/pluginconf.d/packages.conf

D.

/etc/yum.repo.d/kernel.repo

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Question # 48

Which of the following characteristics of YAML and JSON are the most accurate?

A.

JSON uses indentation and substantial white space, while YAML relies on curly braces and semicolons for data structuring.

B.

Due to its ease of use and broad compatibility, JSON is frequently used for configuration files and web APIs, whereas YAML is renowned for its support and human-readable, concise syntax.

C.

JSON is a data interchange format used for configuration files and APIs, whereas YAML is a lightweight markup language frequently used for HTML and XML documents.

D.

YAML is preferred for its rigorous data type and significant support for complex data structures, while JSON is typically used for simple data structures and web APIs.

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Question # 49

Users connecting to a MySQL database on a Linux system report frequent errors. An administrator reviews the following partial output of the /proc/meminfo and free commands:

total used free

Mem: 1011966 151930 860036

Swap: 1191972 1181716 10256

MemTotal: 1011966 kB

MemFree:

SwapTotal: 1191972 kB

SwapFree: 10256 kB

Which of the following should the administrator do to ensure that the MySQL service will continue to run even if the system runs out of swap space? (Select two.)

A.

Issue the sysctl -w vm.overcommit_ratio=100 command.

B.

Issue the sysctl -w vm.overconunit_memory=2 command. (Invalid key)

C.

Issue the dd if=/dev/zero of=/swapfile bs=1024 count=65536 command.

D.

Issue the mkswap /dev/sda2; swapon -v /dev/sda2 command.

E.

Reload the /etc/fstab file by issuing the mount -a command. (Not sufficient alone)

F.

Use disk quotas on the swap space to prevent MySQL from overutilizing the swap partition.

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Question # 50

A Linux administrator is updating the file that contains the addresses of the software and update repositories on an Ubuntu system. Which of the following files needs to be edited to accomplish this task?

A.

/etc/apt/sources.list

B.

/etc/apt/listchanges.conf

C.

/etc/yum/yum.conf

D.

/etc/dnf/dnf.conf

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Question # 51

Users are reporting that a production application has slow performance. A systems administrator logs in to the server and performs some basic checks. Given the following:

yaml

[root@comptia]# ps -o pcpu; pidstat 1

Average: UID PID %usr %system %wait %CPU Command

Average: 0 937242 32.39 0 63.21 32.39 app_prd

Average: 0 937245 44.97 0.31 51.57 45.28 app_prd

Average: 0 937244 23.62 0 63.55 28.62 app_prd

[root@comptia]# vmstat 1

procs memory swap io system cpu

r b swpd free buff cache si so bi bo in cs us sy id wa st

16 0 978912 376320 50804 10296312 0 0 0 44 5503 2962 98 2 0 0 0

[root@comptia]# free -m

total used free shared buff/cache available

Mem: 15533 5063 365 164 10104 9975

Swap: 7931 955 6976

Which of the following is causing the performance issue?

A.

The server does not have enough memory

B.

Too many processes are running on the server

C.

The server CPU is receiving too much load

D.

The server is swapping

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Question # 52

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?

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

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Question # 53

A systems administrator intends to use a UI-JID to mount a new partition per-manently on a Linux system. Which of the following commands can the adminis-trator run to obtain information about the UUlDs of all disks attached to a Linux system?

A.

fcstat

B.

blkid

C.

dmsetup

D.

Isscsi

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Question # 54

A systems administrator is configuring a Linux system so that network traffic from the internal network 172.17.0.0/16 going out through the eth0 interface would appear as if it was sent directly from this interface. Which of the following commands will accomplish this task?

A.

iptables -A POSTROUTING -s 172.17.0.0/16 -o eth0 -j MASQUERADE

B.

firewalld -A OUTPUT -s 172.17.0.0/16 -o eth0 -j DIRECT

C.

nmcli snasq-traffic eth0 -s 172.17.0.0/16 -j MASQUERADE

D.

ifconfig --nat eth0 -s 172.17.0.0/16 -j DIRECT

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Question # 55

NO: 20:

A hardened physical Linux system allows regular, unprivileged users to remotely connect to the server using SSH only. No sudo tool has been installed. Which of the following should the Linux administrator use to perform administrative tasks on this host? (Select two).

A.

Create an SSH key and copy it to the remote server to allow passwordless log-in.

B.

Access the server's physical console and use the root user’s password to log in.

C.

Install the telnet server on this system to be able to use a root account.

D.

Use the su command and enter the root user's password.

E.

Install the sudo command using the unprivileged user’s account.

F.

Add the user to the wheel group.

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Question # 56

A Linux system is having issues. Given the following outputs:

# dig @192.168.2.2 mycomptiahost

; << >> DiG 9.9.4-RedHat-9.9.4-74.el7_6.1 << >> @192.168.2.2 mycomptiahost

; (1 server found)

;; global options: +cmd

;; connection timed out; no servers could be reached

# nc -v 192.168.2.2 53

Ncat: Version 7.70 ( https://nmap.org/ncat )

Ncat: Connection timed out.

# ping 192.168.2.2

PING 192.168.2.2 (192.168.2.2) 56(84) bytes of data.

64 bytes from 192.168.2.2: icmp_seq=1 ttl=117 time=4.94 ms

64 bytes from 192.168.2.2: icmp_seq=2 ttl=117 time=10.5 ms

Which of the following best describes this issue?

A.

The DNS host is down.

B.

The name mycomptiahost does not exist in the DNS.

C.

The Linux engineer is using the wrong DNS port.

D.

The DNS service is currently not available or the corresponding port is blocked.

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Question # 57

Which of the following Git commands would send committed changes to a remote repository?

A.

git stash

B.

git commit -a

C.

git push origin master

D.

git add .

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Question # 58

When trying to connect from the bastion host to the remote server, a Linux user always forgets to add some required options in the SSH command line. Which of the following is the best way to permanently solve the user's issue?

A.

Write a connection script and put it in the user's home directory.

B.

Instruct the user to add the required options to the ~/.ssh/config file

C.

Add the required options to /etc/ssh/sshconfig

D.

Establish an alias for the SSH command with all the required options.

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Question # 59

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?

A.

fdisk -V

B.

partprobe -a

C.

lsusb -t

D.

lsscsi -s

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Question # 60

Ann, a security administrator, is performing home directory audits on a Linux server. Ann issues the su Joe command and then issues the Is command. The

output displays files that reside in Ann's home directory instead of Joe's. Which of the following represents the command Ann should have issued in order to list Joe's files?

A.

su - Joe

B.

sudo Joe

C.

visudo Joe

D.

pkexec joe

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Question # 61

NO: 42:

A systems administrator is working on an SFTP server configuration. Which of the following commands will best enable the connectivity to that service from the 10.10.0.0/24 network?

A.

sudo ufw allow from 10.10.0.0/24 to any port 22

B.

sudo ufw allow in on eth0 to any port 22

C.

sudo ufw allow from 10.10.0.0/24

D.

sudo ufw allow 0:22/tcp from 10.10.0.0

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Question # 62

A systems administrator receives reports of issues in one of the Linux systems. The following output has been provided:

$ dig node.mycomptia.org

; <<>> DiG 9.11.36.x.x <<>> node.mycomptia.org

;; global options: +cmd

;; connection timed out; no servers could be reached

$ cat /etc/resolv.conf

search mycomptia.org

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

A.

echo "8.8.8.8 node.mycomptia.org" >> /etc/hosts

B.

echo "nameserver 8.8.8.8" >> /run/systemd/resolve/resolv.conf

C.

systemctl restart networkd

D.

echo "nameserver 8.8.8.8" >> /etc/resolv.conf

E.

echo "DNS1=8.8.8.8" >> /etc/sysconfig/network-scripts/ifcfg-eth0

F.

systemctl restart NetworkManager

G.

systemctl restart named

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Question # 63

A Linux administrator is configuring network traffic forwarding. Despite having proper iptables rules, the traffic forwarding is not working. Which of the following commands will allow Linux to pass network traffic between different interfaces?

A.

nmcli allow-forwarding eth0

B.

echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf; sysctl -p

C.

ip route forward allow --all-interfaces; systemctl restart network

D.

modprobe ip_forward

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Question # 64

A Linux administrator is creating a new sudo profile for the accounting user. Which of the following should be added by the administrator to the sudo

configuration file so that the accounting user can run / opt/ acc/ report as root?

A.

accounting localhost=/opt/acc/report

B.

accounting ALL=/opt/acc/report

C.

%accounting ALL=(ALL) NOPASSWD: /opt/acc/report

D.

accounting /opt/acc/report= (ALL) NOPASSWD: ALL

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Question # 65

A Linux administrator is investigating the reason a systemd timer is not running every night at midnight. The administrator sees the following unit file:

[Unit]

Description=Execute backup every day at midnight

[Timer]

OnCalendar=--01 00:00:00

Unit=backup.service

RandomizedDelaySec=10800

[Install]

WantedBy=multi-user.target

Which of the following modifications should the administrator make in the unit file? (Select two).

A.

Remove RandomizedDelaySec=10800.

B.

Add WakeSystem=Midnight.

C.

Change OnCalendar to 00:00:00.

D.

Add OnCalendar=--* daily.

E.

Add AccuracySec=1.

F.

Remove OnCalendar=--01 00:00:00.

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Question # 66

A Linux administrator is working on a system and notices that some of the packages are not at the latest version. Which of the following commands should the administrator use to correct this issue?

A.

rpm --update

B.

apt update

C.

dnt update

D.

dpkg --update

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Question # 67

An organization's business office needs to collaborate on quarterly reports and asks the systems administrator to create a finance group. The administrator creates the following directory:

drwxrwxr-x business business 4096 Oct 15 16:40 q1

Which of the following commands will allow all members of the finance group to have group ownership of all files created in the q1 directory while ensuring that members of the business group preserve access? (Select two.)

A.

chgrp finance q1/

B.

chmod g+s q1/

C.

chmod u+s q1/

D.

chmod a+x q1/

E.

chown finance q1/

F.

chmod g+x q1/

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Question # 68

A new drive was recently added to a Linux system. Using the environment and tokens provided, complete the following tasks:

• Create an appropriate device label.

• Format and create an ext4 file system on the new partition.

The current working directory is /.

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Question # 69

A Linux user would like the shell changed to /bin/bash. Which of the following commands will accomplish this task?

A.

usermod -g /bin/bash user

B.

usermod -s /bin/bash user

C.

usermod -p /bin/bash user

D.

usermod -d /bin/bash user

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Question # 70

A systems administrator receives the following message after running an ip link command to verify the status of a network interface named enp0s3:

state DOWN

Which of the following commands should the administrator use to resolve this issue?

A.

ip link set enp0s3 up

B.

ip link ifb enp0s3 up

C.

ip link add enp0s3 up

D.

ip link enp0s3 up

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Question # 71

A systems administrator wants to ensure all the latest patches and updates are automatically synced to the local repository every two hours on Sundays through Tuesdays in the month of May. Which of the following cron entries can the administrator use to achieve this goal? (Select two.)

A.

0 */2 * 5 0-3 /root/update-from-remote-to-local.sh

B.

0 0,2,4,6,8,10,12,14 * 5 0-2 /root/update-from-remote-to-local.sh

C.

0 0,2,4,6,8,10,12,14 * 5 0-3 /root/update-from-remote-to-local.sh

D.

0 0-23/2 * 5 0-3 /root/update-from-remote-to-local.sh

E.

0 0-23/2 * 5 0-2 /root/update-from-remote-to-local.sh

F.

0 */2 * 5 0-2 /root/update-from-remote-to-local.sh

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Question # 72

The application team has reported latency issues that are causing the application to crash on the Linux server. The Linux administrator starts

troubleshooting and receives the following output:

Which of the following commands will improve the latency issue?

A.

# echo 'net.core.net_backlog = 5000000' >> /etc/sysctl.conf# sysctl -p# systemctl daemon-reload

B.

# ifdown eth0# ip link set dev eth0 mtu 800# ifup eth0

C.

# systemctl stop network# ethtool -g eth0 512# systemctl start network

D.

# echo 'net.core.rmem max = 12500000' >> /etc/sysctl.conf# echo 'net.core.wmem_max = 12500000' >> /etc/sysctl.conf# sysctl -p

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Question # 73

A Linux administrator needs to determine whether a hostname is in the DNS. Which of the following would supply the information that is needed?

A.

nslookup

B.

rsynс

C.

netstat

D.

host

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Question # 74

A junior developer is unable to access an application server and receives the following output:

The systems administrator investigates the issue and receives the following output:

Which of the following commands will help unlock the account?

A.

Pam_tally2 --user=dev2 —-quiet

B.

pam_ tally2 --user=dev2

C.

pam_tally2 -–user+dev2 —-quiet

D.

pam_tally2 --user=dev2 —-reset

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Question # 75

A Linux administrator needs to check the content of a log file that is appending data as the file grows. Which of the following commands should the administrator use to accomplish this task?

A.

tail -f log.txt

B.

tail -v log.txt

C.

tail -c log.txt

D.

tail log.txt

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Question # 76

A Linux server is not starting up because files in the /boot/ partition are corrupt. After the initial GRUB screen, the following message is displayed:

vbnet

Probing EDD (edd=off to disable)... ok

uncompression error

—system halted

Which of the following steps should the Linux administrator take to recover the system without destroying the existing installation? (Select two.)

A.

Replace the hard drive.

B.

Increase the amount of swap memory.

C.

Start up in single-user mode.

D.

Start up the system using rescue boot media.

E.

Reinstall the kernel packages.

F.

Reinstall the OS.

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Question # 77

A Linux administrator is creating a user that can run the FTP service but cannot log in to the system. The administrator sets /bin/false as a login shell for the user. When the user tries to run the FTP service, it is rejected with an "invalid shell: /bin/false" message. Which of the following is the best way to resolve the issue?

A.

Change ownership of /bin/false to the FTP user

B.

Add /bin/false entry to the /etc/shells file

C.

Make /bin/false an executable file

D.

Change the user’s default shell to /bin/bash

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Question # 78

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?

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

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Question # 79

An administrator runs ping comptia.org. The result of the command is:

ping: comptia.org: Name or service not known

Which of the following files should the administrator verify?

A.

/etc/ethers

B.

/etc/services

C.

/etc/resolv.conf

D.

/etc/sysctl.conf

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Question # 80

Which of the following command sequences is used to install Linux software directly from source code?

A.

./config → ./compile → ./copy

B.

unzip → gcc → install

C.

./unpack → make exec → make copy

D.

./configure → make → make install

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Question # 81

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

A.

Server clustering

B.

Load balancing

C.

RAID

D.

VDI

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Question # 82

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?

A.

vgchange -ay data

B.

lvscan --all

C.

vgimport data

D.

lvchange -ay /dev/data/files

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Question # 83

A systems administrator needs to create a new service unit file. This new unit file is required to start when all services are running with the command-line interface only. Which of the following options should the administrator use to accomplish this task?

A.

WantedBy=basic.target

B.

WantedBy=network-online.target

C.

WantedBy=multi-user.target

D.

WantedBy=graphical.target

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Question # 84

A Linux administrator is changing the default system umask. The newly created files should have the -rw-r----- permission, and the newly created directories should have the drwxr----- permission. Which of the following commands should the administrator use?

A.

umask 0035

B.

umask 0036

C.

umask 0037

D.

umask 0038

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Question # 85

An administrator is troubleshooting a database service outage that was reported by a monitoring system. Given the following output:

$ systemctl status mariadb

Oct 20 16:40:45 comptia systemd[1]: mariadb.service: Main process exited, code=killed, status=9/KILL

Oct 20 16:40:45 comptia systemd[1]: mariadb.service: Failed with result 'signal'.

Oct 20 16:40:50 comptia systemd[1]: Stopped MariaDB 10.3 database server.

$ dmesg

[ 1061.491433] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom, task_memcg=/system.slice/mariadb.service, task=mysqld,pid=1981,uid=27

[ 1061.491453] Out of memory: Killed process 1981 (mysqld) total-vm:330668kB, anon-rss:31316kB, file-rss:OkB, shmem-rss:OkB, UID:27 pgtables:324kB oom_score_adj:0

Which of the following is the reason for the outage?

A.

The administrator sent a kill signal to the database

B.

The server is missing the DMA bus

C.

The database cannot write anything else to the storage

D.

The server does not have enough physical memory

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Question # 86

A Linux engineer finds multiple failed login entries in the security log file for application users. The Linux engineer performs a security audit and discovers a security issue. Given the following:

# grep -iE '*www*|db' /etc/passwd

www-data:x:502:502:www-data:/var/www:/bin/bash

db:x: 505:505:db: /opt/db:/bin/bash

Which of the following commands would resolve the security issue?

A.

usermod -d /srv/www-data www-data && usermod -d /var/lib/db db

B.

passwd -u www-data && passwd -u db

C.

renice -n 1002 -u 502 && renice -n 1005 -u 505

D.

chsh -s /bin/false www-data && chsh -s /bin/false db

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Question # 87

Which of the following is a way to enable a production web server's communications with strong encryption and identity verification?

A.

Creating a key pair using ssh-keygen and using the generated key pair to secure the HTTPS communication

B.

Creating a private key locally using openssl, creating a certificate request, sending the request to an external certification provider, and using the provided certificate for HTTPS communication

C.

Creating a 4096-bytes or longer self-signed certificate using openssl and using it to secure HTTPS communication

D.

Creating a secret file using /dev/random as a source and using the generated file for HTTPS communication

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Question # 88

A systems administrator created a new directory with specific permissions. Given the following output:

arduino

$ ls -ld /comptia

drwxr-x--- 2 root root 4096 Oct 20 20:13 /comptia

$ getfacl /comptia

# file: /comptia

# owner: root

# group: root

user::rwx

group::r-x

other::---

default:user::rwx

default:group::r-x

default:group:wheel:rwx

default:mask::rwx

default:other::---

Which of the following permissions are enforced on /comptia?

A.

Members of the wheel group can read files in /comptia.

B.

Newly created files in /comptia will have the sticky bit set.

C.

Other users can create files in /comptia.

D.

Only root can create files in /comptia.

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Question # 89

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?

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

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Question # 90

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

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

A.

fsck.ext4 /dev/sda1

B.

partprobe /dev/sda1

C.

fdisk /dev/sda1

D.

mkfs.ext4 /dev/sda1

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Question # 91

A systems administrator is tasked with installing GRUB on the legacy MBR of the SATA hard drive. Which of the following commands will help the administrator accomplish this task?

A.

grub-install /dev/hda

B.

grub-install /dev/sda

C.

grub-install /dev/sr0

D.

grub-install /dev/hd0,0

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Question # 92

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?

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

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Question # 93

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?

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

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Question # 94

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?

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

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Question # 95

A systems administrator wants to test the route between IP address 10.0.2.15 and IP address 192.168.1.40. Which of the following commands will accomplish this task?

A.

route -e get to 192.168.1.40 from 10.0.2.15

B.

ip route get 192.163.1.40 from 10.0.2.15

C.

ip route 192.169.1.40 to 10.0.2.15

D.

route -n 192.168.1.40 from 10.0.2.15

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Question # 96

A Linux administrator needs to remove software from the server. Which of the following RPM options should be used?

A.

rpm -s

B.

rрm -d

C.

rpm -q

D.

rpm -e

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Question # 97

A DevOps engineer needs to allow incoming traffic to ports in the range of 4000 to 5000 on a Linux server. Which of the following commands will enforce this rule?

A.

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

B.

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

C.

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

D.

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

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Question # 98

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

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

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.

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Question # 99

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?

A.

dmidecode -s system-version

B.

lscpu

C.

sysctl -a

D.

cat /sys/device/system/cpu/possible

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Question # 100

An administrator accidentally deleted the /boot/vmlinuz file and must resolve the issue before the server is rebooted. Which of the following commands should the administrator use to identify the correct

version of this file?

A.

rpm -qa | grep kernel; uname -a

B.

yum -y update; shutdown -r now

C.

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

D.

telinit 1; restorecon -Rv /boot

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Question # 101

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?

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

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Question # 102

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?

A.

visudo -c

B.

test -f /etc/sudoers

C.

sudo vi check

D.

cat /etc/sudoers | tee test

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Question # 103

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?

A.

id_dsa.pem

B.

id_rsa

C.

id_ecdsa

D.

id_rsa.pub

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Question # 104

A Linux administrator created the directory /project/access2all. By creating this directory, the administrator is trying to avoid the deletion or modification of files from non-owners. Which of the following will accomplish this goal?

A.

chmod +t /project/access2all

B.

chmod +rws /project/access2all

C.

chmod 2770 /project/access2all

D.

chmod ugo+rwx /project/access2all

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Question # 105

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?

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

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Question # 106

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?

A.

rpm -i wget

B.

rpm -qf wget

C.

rpm -F wget

D.

rpm -V wget

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Question # 107

Junior system administrator had trouble installing and running an Apache web server on a Linux server. You have been tasked with installing the Apache web server on the Linux server and resolving the issue that prevented the junior administrator from running Apache.

INSTRUCTIONS

Install Apache and start the service. Verify that the Apache service is running with the defaults.

Typing “help” in the terminal will show a list of relevant event commands.

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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Question # 108

A junior administrator is setting up a new Linux server that is intended to be used as a router at a remote site. Which of the following parameters will accomplish this goal?

A.

B.

C.

D.

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Question # 109

A Linux administrator would like to use systemd to schedule a job to run every two hours. The administrator creates timer and service definitions and restarts the server to load these new configurations. After the restart, the administrator checks the log file and notices that the job is only running daily. Which of the following is MOST likely causing the issue?

A.

The checkdiskspace.service is not running.

B.

The checkdiskspace.service needs to be enabled.

C.

The OnCalendar schedule is incorrect in the timer definition.

D.

The system-daemon services need to be reloaded.

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Question # 110

A systems administrator made some unapproved changes prior to leaving the company. The newly hired administrator has been tasked with revealing the system to a compliant state. Which of the following commands will list and remove the correspondent packages?

A.

dnf list and dnf remove last

B.

dnf remove and dnf check

C.

dnf info and dnf upgrade

D.

dnf history and dnf history undo last

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Question # 111

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?

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

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Question # 112

An administrator attempts to rename a file on a server but receives the following error.

The administrator then runs a few commands and obtains the following output:

Which of the following commands should the administrator run NEXT to allow the file to be renamed by any user?

A.

chgrp reet files

B.

chacl -R 644 files

C.

chown users files

D.

chmod -t files

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Question # 113

A systems administrator needs to check if the service systemd-resolved.service is running without any errors. Which of the following commands will show this information?

A.

systemct1 status systemd-resolved.service

B.

systemct1 enable systemd-resolved.service

C.

systemct1 mask systemd-resolved.service

D.

systemct1 show systemd-resolved.service

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Question # 114

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?

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.

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Question # 115

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

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

A.

chattr +a /opt/app/logs

B.

chattr +d /opt/app/logs

C.

chattr +i /opt/app/logs

D.

chattr +c /opt/app/logs

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Question # 116

A Linux administrator wants to set the SUID of a file named dev_team.text with 744 access rights. Which of the following commands will achieve this goal?

A.

chmod 4744 dev_team.txt

B.

chmod 744 --setuid dev_team.txt

C.

chmod -c 744 dev_team.txt

D.

chmod -v 4744 --suid dev_team.txt

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Question # 117

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?

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.

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Question # 118

A new file was added to a main Git repository. An administrator wants to synchronize a local copy with the contents of the main repository. Which of the following commands should the administrator use for this task?

A.

git reflog

B.

git pull

C.

git status

D.

git push

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Question # 119

A user generated a pair of private-public keys on a workstation. Which of the following commands will allow the user to upload the public key to a remote server and enable passwordless login?

A.

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

B.

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

C.

ssh-add user server

D.

ssh-copy-id user@server

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Question # 120

Some servers in an organization have been compromised. Users are unable to access to the organization’s web page and other services. While reviewing the system log, a systems administrator notices messages from the kernel regarding firewall rules:

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

A.

B.

C.

D.

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Question # 121

A Linux administrator needs to analyze a failing application that is running inside a container. Which of the following commands allows the Linux administrator to enter the running container and analyze the logs that are stored inside?

A.

docker run -ti app /bin/sh

B.

podman exec -ti app /bin/sh

C.

podman run -d app /bin/bash

D.

docker exec -d app /bin/bash

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Question # 122

An administrator is trying to diagnose a performance issue and is reviewing the following output:

System Properties:

CPU: 4 vCPU

Memory: 40GB

Disk maximum IOPS: 690

Disk maximum throughput: 44Mbps | 44000Kbps

Based on the above output, which of the following BEST describes the root cause?

A.

The system has reached its maximum IOPS, causing the system to be slow.

B.

The system has reached its maximum permitted throughput, therefore iowait is increasing.

C.

The system is mostly idle, therefore the iowait is high.

D.

The system has a partitioned disk, which causes the IOPS to be doubled.

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Question # 123

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?

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

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Question # 124

Which of the following commands will display the operating system?

A.

uname -n

B.

uname -s

C.

uname -o

D.

uname -m

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Question # 125

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:

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

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.

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Question # 126

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?

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.

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Question # 127

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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Question # 128

A DevOps engineer needs to download a Git repository from https://git.company.com/admin/project.git. Which of the following commands will achieve this goal?

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Question # 129

A Linux systems administrator is setting up a new web server and getting 404 - NOT FOUND errors while trying to access the web server pages from the browser. While working on the diagnosis of this issue, the Linux systems administrator executes the following commands:

Which of the following commands will BEST resolve this issue?

A.

sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

B.

restorecon -R -v /var/www/html

C.

setenforce 0

D.

setsebool -P httpd_can_network_connect_db on

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Question # 130

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?

A.

systemct1 cancel nginx

B.

systemct1 disable nginx

C.

systemct1 mask nginx

D.

systemct1 stop nginx

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Question # 131

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

A.

/etc/systemd/journald.conf

B.

/etc/systemd/systemd-journalctl.conf

C.

/usr/lib/systemd/journalctl.conf

D.

/etc/systemd/systemd-journald.conf

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Question # 132

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?

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

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Question # 133

A Linux systems administrator needs to persistently enable IPv4 forwarding in one of the Linux systems. Which of the following commands can be used together to accomplish this task? (Choose two.)

A.

sysctl net.ipv4.ip_forward

B.

sysctl -w net.ipv4.ip_forward=1

C.

echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf

D.

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

E.

sysctl –p

F.

echo "net.ipv6.conf.all.forwarding=l" >> /etc/sysctl.conf

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Question # 134

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

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

Which of the following is causing the issue?

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.

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Question # 135

A cloud engineer needs to change the secure remote login port from 22 to 49000. Which of the following files should the engineer modify to change the port number to the desired value?

A.

/etc/host.conf

B.

/etc/hostname

C.

/etc/services

D.

/etc/ssh/sshd_config

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Question # 136

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?

A.

partprobevgcreatelvextend

B.

lvcreatefdiskpartprobe

C.

fdiskpartprobemkfs

D.

fdiskpvcreatevgextend

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Question # 137

A systems administrator is investigating an issue in which one of the servers is not booting up properly. The journalctl entries show the following:

Which of the following will allow the administrator to boot the Linux system to normal mode quickly?

A.

Comment out the /opt/app filesystem in /etc/fstab and reboot.

B.

Reformat the /opt/app filesystem and reboot.

C.

Perform filesystem checks on local filesystems and reboot.

D.

Trigger a filesystem relabel and reboot.

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Question # 138

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?

A.

pull -> push -> add -> checkout

B.

pull -> add -> commit -> push

C.

checkout -> push -> add -> pull

D.

pull -> add -> push -> commit

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Question # 139

The security team has identified a web service that is running with elevated privileges A Linux administrator is working to change the systemd service file to meet security compliance standards. Given the following output:

Which of the following remediation steps will prevent the web service from running as a privileged user?

A.

Removing the ExecStarWusr/sbin/webserver -D SOPTIONS from the service file

B.

Updating the Environment File line in the [Service] section to/home/webservice/config

C.

Adding the User-webservice to the [Service] section of the service file

D.

Changing the:nulti-user.target in the [Install] section to basic.target

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Question # 140

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

A.

Kerberos

B.

SELinux

C.

PAM

D.

PKI

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Question # 141

A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots. Which of the following commands should be run on the DNS forwarder server to accomplish this task?

A.

ufw allow out dns

B.

systemct1 reload firewalld

C.

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

D.

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

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