A Linux administrator needs to remove a USB drive from a system. The unmountcommand fails, stating the device is busy. Which of the following commands will show the reason for this error?

After installing a new web server, you are unable to browse to the default web page.
INSTRUCTIONS
Review all the command output and select the command needed to remediate the issue.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

An operator finds a user is having issues with opening certain files.
Which of the following commands would allow the security administrator to list and check the SELinux context?

A Linux administrator needs to disable the Sendmail service on a Linux server and prevent it from being started manually and during boot.
Which of the following is the BEST command to do this?

A Linux administrator is testing a new web application on a local laptop and consistently shows the following
403 errors in the laptop's logs"

The web server starts properly, but an error is generated in the audit log. Which of the following settings should be enabled to prevent this audit message?