Diagnose And Correct File Permission Problems

General Information

Troubleshooting file permissions issues.

Things to Keep in Mind

Items to keep in mind when troubleshooting file permissions issues.

Anytime an ACL is updated, the mask changes (max level of permissions changes).
Group ACL entries do not change when normal group permissions change.
cp command does not preserve ACL rules, but mv does.
Default ACL permissions are for inheritance.

Apply execute permissions to directories and sub dirs only

chmod -R g+rwX /mydir

The capital “X” applies only to directories
Execute permissions are required to cd into a directory