Why Does a Linux Server Keep Logging Permission Denied for a Readable File?

A file can appear readable to an administrator while a service is denied access because of its runtime user, parent directory permissions, ACLs, or mandatory access controls.

What to check

Check the process identity, every parent directory, ACLs, mount options, and relevant SELinux or AppArmor denials. Reproduce as the service account rather than changing permissions broadly.

Recommended next step

Grant the narrow access required and verify under the service identity. Informatix Systems can troubleshoot Linux permissions and application security.