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Chapter 3. Troubleshooting issues related to SELinux

For diagnosing issues related to SELinux, you can check the file /var/log/audit/audit.log, as follows:

  1. To query Audit logs, use the ausearch tool. SELinux decisions, such as allowing or disallowing access, are cached in the Access Vector Cache (AVC). Therefore, you should use the AVC and USER_AVC values for the message type parameter, for example: 

    # ausearch -m AVC,USER_AVC,SELINUX_ERR,USER_SELINUX_ERR -ts boot
  2. If there are no matches, check if the Audit daemon is running.

  3. If it is not running, perform the following steps:

    1. Restart the audit.
    2. Re-run the denied scenario.
    3. Check the Audit log again.

    For more information about solving SELinux-related issues, see Troubleshooting problems related to SELinux.

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