XK0-005 practice questions 181–190

1. Question 181 · 300 in bank

   A systems administrator requires that all files that are created by the user named web have read-only permissions by the owner. Which of the following commands will satisfy this requirement?

   • Achown web:web /home/web
   • Bchmod -R 400 /home/web
   • Cecho "umask 377" >> /home/web/.bashrc
   • Dsetfacl read /home/web

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   Answer: C

   Explanation

   The correct answer is C. The "echo "umask 377" >> /home/web/.bashrc" command will satisfy the requirement by adding the umask setting to the user's .bashrc file. The umask setting determines the default file permissions for newly created files and directories. The value of 377 sets the default permissions to read-only for the owner of the file. The umask is specified in octal notation, and each digit represents the permissions for a different category of users. In this case, the first digit represents the permissions for the owner of the file, the second digit represents the permissions for the group owner of the file, and the third digit represents the permissions for others. A value of 3 means that the owner has read and write permissions, and a value of 7 means that the owner has read, write, and execute permissions. By setting the umask to 377, the owner of newly created files will have read-only permissions, the group owner will have no permissions, and others will have no permissions.

   Source: Adapted from community discussion — linux_admin

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2. Question 182 · 300 in bank

   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? (Choose two.)

   • A0 */2 * 5 0-3 /root/update-from-remote-to-local.sh
   • B0 0,2,4,6,8,10,12,14 * 5 0-3 /root/update-from-remote-to-local.sh
   • C0 0,2,4,6,8,10,12,14 * 5 0-2 /root/update-from-remote-to-local.sh
   • D0 0-23/2 * 5 0-3 /root/update-from-remote-to-local.sh
   • E0 0-23/2 * 5 0-2 /root/update-from-remote-to-local.sh
   • F0 */2 * 5 0-2 /root/update-from-remote-to-local.sh

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   Answer: E

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3. Question 183 · 300 in bank

   A systems administrator is tasked with preventing logins from accounts other than root, while the file /etc/nologin exists. Which of the following PAM modules will accomplish this task?

   • Apam_login.so
   • Bpam_access.so
   • Cpam_logindef.so
   • Dpam_nologin.so

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   Answer: D

   Explanation

   The correct PAM module to accomplish the task of preventing logins from accounts other than root when the file /etc/nologin exists is pam_nologin.so. This PAM module checks for the existence of the /etc/nologin file and denies logins if the file exists. By using pam_nologin.so in the appropriate PAM configuration file, the systems administrator can ensure that only root logins are allowed when the /etc/nologin file is present.

   Source: Adapted from community discussion — linux_admin

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4. Question 184 · 300 in bank

   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?

   • Anmap 192.168.47.0/32
   • Bnetcat 192.168.47.44
   • Cnmap 192.168.47.44 -Pn
   • Dping -c 1 192.168.47.44

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   Answer: D

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5. Question 185 · 300 in bank

   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?

   • Asystemctl cancel nginx
   • Bsystemctl disable nginx
   • Csystemctl mask nginx
   • Dsystemctl stop nginx

   Show answer

   Answer: C

   Explanation

   Answer B (systemctl disable nginx) and answer C (systemctl mask nginx) both achieve the goal of disabling the nginx service, but they do it in different ways. The systemctl disable nginx command disables the nginx service so that it will not start automatically when the system boots up. However, the service can still be manually started if needed. The systemctl mask nginx command masks the nginx service, which means that it cannot be started, either automatically or manually. This is a more secure option compared to systemctl disable nginx, as it completely prevents the service from being started. In this scenario, either answer B or answer C would be correct, depending on the level of security that the systems administrator wants to enforce. If the administrator wants to prevent the nginx service from starting in any circumstance, then answer C (systemctl mask nginx) is the better choice. If the administrator wants to prevent the nginx service from starting automatically but still allow it to be manually started if needed, then answer B (systemctl disable nginx) is the better choice.

   Source: Adapted from community discussion — linux_admin

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6. Question 186 · 300 in bank

   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?

   • AEnable the logsearch.service and restart the service.
   • BIncrease the TimeoutStartUSec configuration for the logsearch.sevice.
   • CUpdate the OnCalendar configuration to schedule the start of the logsearch.service.
   • DUpdate the KillSignal configuration for the logsearch.service to use TERM.

   Show answer

   Answer: B

   Explanation

   The TimeoutStartUSec configuration determines the amount of time that the system service manager should wait for the service to start before timing out. If the logsearch.service is taking longer than the specified timeout to start, the system service manager may consider the service to have failed to start and may terminate it. Increasing the TimeoutStartUSec configuration for the logsearch.service would give it more time to start and prevent it from being terminated prematurely. This may be necessary if the service requires additional time to start due to resource constraints or other factors.

   Source: Adapted from community discussion — linux_admin

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7. Question 187 · 300 in bank

   A Linux engineer receives the following notification from a system: cp: cannot create regular file '/app/appdata.tar': No space left on device The engineer obtains the following output:

   

   Which of the following describes the state of the filesystem based on this output?

   • AThe filesystem was mounted in read-only mode.
   • BThe filesystem has depleted the available modes.
   • CThe filesystem is not mounted in the correct location.
   • DThe filesystem has consumed the available space.

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   Answer: B

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8. Question 188 · 300 in bank

   A Linux administrator has installed a web server, a database server, and a web application on a server. The web application should be active in order to render the web pages. After the administrator restarts the server, the website displays the following message in the browser: Error establishing a database connection. The Linux administrator reviews the following relevant output from the systemd init files:

   

   The administrator needs to ensure that the database is available before the web application is started. Which of the following should the administrator add to the HTTP server .service file to accomplish this task?

   • ATRIGGERS=mariadb.service
   • BONFAILURE=mariadb.service
   • CWANTEDBY=mariadb.service
   • DREQUIRES=mariadb.service

   Show answer

   Answer: D

   Explanation

   The correct answer is D. REQUIRES=mariadb.service. The REQUIRES directive in systemd tells systemd that the HTTP server service depends on the mariadb.service service. This means that systemd will not start the HTTP server service until the mariadb.service service is started and running.

   Source: Adapted from community discussion — Alizadeh

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9. Question 189 · 300 in bank

   A DevOps engineer wants to work on a snapshot of the infrastructure as code configuration. Which of the following commands should the engineer use to accomplish this task?

   • Agit pull
   • Bgit push
   • Cgit branch
   • Dgit tag

   Show answer

   Answer: D

   Explanation

   A. git pull is used for fetch and merge changes from a remote repository into the current branch in your local repository. B. git push is used to upload your local repository content to a remote repository. C. git branch is used to list, create, or delete branches in your repository git branch new-branch -- create a new branch git branch -- list all branch D. git tag is used to create a snapshot or a tag in the repository's history. tags are often used to mark important points, such as releases or versions.

   Source: Adapted from community discussion — NastyNutsu

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10. Question 190 · 300 in bank

    A Linux administrator is configuring a log collector agent to monitor logs in /var/log/collector. The agent is reporting that it cannot write in the directory. The agent runs as the logger user account. The administrator runs a few commands and reviews the following output: Output 1:

    

    Output 2: * file: /var/log/collector * owner: root * group: root user::rwx group::r-x mask::rwx other::r-x default:user:rwx default:group::r-x default:mask::rwx default: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?

    • Asetfacl -Rm u:logger:rw /var/log/collector
    • Busermod -aG root logger
    • Cchmod 644 /var/log/collector
    • Dchown -R logger:monitor /var/log

    Show answer

    Answer: A

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XK0-005 practice, question 181. 300 questions available.