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:makefileOutput 1:drwxr-xr-x. 1 root root 0 Oct 20:13 collectorOutput 2:file: /var/log/collectorowner: rootgroup: rootuser::rwxgroup::r-xmask::rwxother::r-xOutput 3:uid=1010(logger) gid=1010(monitor) groups=1010(monitor)Which of the following is the best way to resolve the issue?

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

An administrator is running a web server in a container named WEB, but none of the error output is showing. Which of the following should the administrator use to generate the errors on the container?

docker run --name WEB --volume /dev/stdout:/var/log/nginx/error.log

An operations engineer is planning to start a container running a PostgreSQL database. The engineer wants the container to start automatically at system startup, mount the /home/db directory as /var/lib/postgresql inside the container, and expose port 5432 to the OS. Which of the following commands should the engineer run to achieve this task?

docker run -d --restart always -p 5432:5432 -v /home/db:/var/lib/postgresql postgresql:12

docker run -d --restart -p 5432:5432 --volume /var/lib/postgresql:/home/db postgresql:12

docker run -d --attach --platform 5432:5432 --volume /home/db:/var/lib/postgresql postgresql:12

docker run -d --init --restart --publish 5432:5432 --workdir /home/db:/var/lib/postgresql postgresql:12

A Linux administrator would like to measure possible packet loss between a workstation and a remote web application that is running on port 443. Which of the following would be the best command for the administrator to use to display this information?

mtr -T -P 443 <remote server IP>

tcpdump -p 443 <remote server IP>

mtr -T -P 443 <remote server IP>

traceroute -p 443 <remote server IP>

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).

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

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

Create an SSH key and copy it to the remote server to allow passwordless login

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

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

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

Install the sudo command using the unprivileged user's account

Add the user to the wheel group

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?

bash for 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

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

bash for 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

bash for 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

bash ssh user@$(cat /home/user/serverslist) 'sudo useradd $(cat /home/user/userslist); exit'

SIMULATIONA 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.INSTRUCTIONSPart 1Review the command output and build the correct command to place the private key into your SSH folder.Part 2Review the command output and build the correct command to set the file permissions.Part 3Review 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 4Select the proper file to edit for remote server access. Then, build the correct configuration output based on the server name, ports, and files.

See the Explanation part for detailed answer of each part

A Linux administrator encounters the following error in the Apache log files:cssSQLSTATE[HY000] [2002] Permission deniedWhich of the following commands should the administrator run to safely fix this issue?

setsebool -F httpd_can_network_connect_db on

chcon -c httpd_sys_content_t /home/apache

setsebool -F httpd_can_network_connect_db on

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).

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

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

Create an SSH key and copy it to the remote server to allow passwordless login

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

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

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

Install the sudo command using the unprivileged user's account

Add the user to the wheel group

Which of the following options describes the purpose of YAML?

YAML is used for configuration files and data serialization in IaC tools in a human-readable format

YAML is a binary format used to ensure data transfer in a non-human-readable format

YAML is used for configuration files and data serialization in IaC tools in a human-readable format

YAML is like HTML and is used to create web page structure content for web deployment

YAML is designed for web development and has libraries for infrastructure automation

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 1Average: UID PID %usr %system %wait %CPU CommandAverage: 0 937242 32.39 0 63.21 32.39 app_prdAverage: 0 937245 44.97 0.31 51.57 45.28 app_prdAverage: 0 937244 23.62 0 63.55 28.62 app_prd[root@comptia]# vmstat 1procs memory swap io system cpur b swpd free buff cache si so bi bo in cs us sy id wa st16 0 978912 376320 50804 10296312 0 0 0 44 5503 2962 98 2 0 0 0[root@comptia]# free -mtotal used free shared buff/cache availableMem: 15533 5063 365 164 10104 9975Swap: 7931 955 6976Which of the following is causing the performance issue?

The server does not have enough memory

Too many processes are running on the server

The server CPU is receiving too much load

After connecting to a remote host via SSH, an administrator attempts to run an application but receives the following error:arduinoError: cannot open display:Which of the following should the administrator do to resolve this error?

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

Disconnect from the SSH session and reconnect using the ssh -X command

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

Open port 6000 on the workstation and restart the firewalld service

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

Which of the following commands should a technician use to create an administrative account for the username Joe?

sudo useradd joe; sudo passwd -l joe

sudo useradd joe; sudo cat key.pem > ~/.ssh/authorized_keys

sudo useradd joe; groupadd admin joe

A Linux administrator needs to forward port 8000 on a remote server to port 8000 on a local server. Which of the following commands should the administrator run on the local server to achieve this goal?

ssh -R 8000:localhost:9000 remote

firewall-cmd --add-forward-port=port=8000 =tcp =8000 =remote

iptables -A FORWARD -m state -p tcp -d remote --dport 9000 -j accept

ssh -R 8000:localhost:9000 remote

socat TCP4-LISTEN:8000,fork TCP4:remote:8000

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.shThe backups, however, are not being created. When checking the crontab file, the administrator sees the following error:/var/spool/cron/crontab/cron: Permission deniedWhich of the following will permit the cronjob to execute?

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

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

Running sudo cron restart to activate the cronjob

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

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?

Configure a sidecar to perform log shipping

Run docker exec to access the logs within the container

Execute docker inspect and run a log rsync replication

Set up a custom task scheduler via kubectl

A Linux administrator needs to run a web application on a server that requires the use of a desktop web browser to enter the final configuration information. The administrator determines the server is running in multi-user mode. The administrator verifies that a web browser is installed on the server and that it has a display manager installed. Which of the following commands will best allow the administrator to temporarily use the web browser on the server?

sudo systemctl isolate graphical.target

sudo systemctl set-default runlevel5.target

sudo systemctl --no-wall rescue

A security analyst is monitoring the network to identify latency or slowdowns during a vulnerability scan. bashfunction x() {info=$(ping -c 1 $1 | awk -F '/' 'END {print $5}')echo '$1 | $info'}Which of the following functions will best achieve this?

function x() { info=$(ping -c 1 $1 | awk -F '/' 'END {print $5}'); echo '$1 | $info' }

function x() { info=$(dig $(dig -x $1 | grep ptr | tail -n 1 | awk -F '.in-addr' '{print $1}').origin.asn.cymru.com TXT +short); echo '$1 | $info' }

function x() { info=$(ping -c 1 $1 | awk -F '/' 'END {print $5}'); echo '$1 | $info' }

function x() { info=$(nc -m 40 $1 | awk 'END {print $1}'); echo '$1 | $info' }

function x() { info=$(geoiplookup $1); echo '$1 | $info' }

Which of the following will prevent non-root SSH access to a Linux server?

Creating the /etc/nologin.allow file containing only a single line root

Creating the /etc/nologin/login.deny file containing a single line -all

Ensuring that /etc/pam.d/sshd includes account sufficient pam_nologin.so

An administrator is troubleshooting a database service outage that was reported by a monitoring system. Given the following output:$ systemctl status mariadbOct 20 16:40:45 comptia systemd[1]: mariadb.service: Main process exited, code=killed, status=9/KILLOct 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:0Which of the following is the reason for the outage?

The server does not have enough physical memory

The administrator sent a kill signal to the database

The server is missing the DMA bus

The database cannot write anything else to the storage

The server does not have enough physical memory

The MySQL database process that was running on a Linux server suddenly stopped, and the process was killed. Which of the following commands can help identify whether this issue was produced by the OOM killer?

grep -ir 'out of memory' /var/log

cat /var/run/initramfs/overlayroot.log | grep 'out of memory'

CompTIA XK0-005 Practice Test 9 - Free Online Exam Prep & Questions

A Linux administrator is implementing a CI/CD process for the company's internal accounting web application. Which of the following best defines the purpose of this process?

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CompTIA XK0-005 Practice Test 9

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