Cron checker
This is why the UNIX approach of using flat text files for dynamic information is obsolete.  It seems so simple to have a text file. But then you need an editor, a locking system, access control, and a checker. And probably something to remove orphaned lock files and detect corrupted data.<p>Those are all database functions.  In UNIX/Linux, each configuration file has its own mechanism for all that. They're all inferior to SQLite.