Exam SK0-005 topic 1 question 359 discussion

The error message "AVC denial" indicates that SELinux (Security-Enhanced Linux) is blocking the operation. SELinux enforces mandatory access controls on Linux systems, and AVC (Access Vector Cache) denial messages indicate that SELinux has denied access to a particular operation. To allow the MySQL update to install while SELinux is enabled, the technician should choose option B. Issue the setenforce 0 command. This command temporarily sets SELinux to permissive mode, which logs denials but does not enforce them. This allows the technician to install the MySQL update without SELinux blocking the operation. However, it's important to note that setting SELinux to permissive mode should be done cautiously, and SELinux should be set back to enforcing mode (setenforce 1) after completing the update to maintain security posture.

B. Issue the setenforce 0 command. The error message "AVC denial" typically indicates an SELinux (Security-Enhanced Linux) permission issue. SELinux enforces mandatory access controls on Linux systems, and AVC denial suggests that SELinux is preventing the MySQL update from installing due to security policies. Thhe "setenforce 0" command temporarily sets SELinux to permissive mode, which means that SELinux policies will be logged but not enforced. By setting SELinux to permissive mode, the technician can attempt the MySQL update again. If the update completes successfully in permissive mode, it confirms that SELinux was indeed blocking the update. However, leaving SELinux in permissive mode is not a recommended long-term solution as it reduces the security posture of the system.