Unix file permissions can take many shapes: symbolic (ug+rw), octal (660) or a list of characters (drw-rw----). This library enables using any of these (instead of being limited to a single one) with any Node.js or CLI command.
Node.js prints process errors (uncaughtException, warning, unhandledRejection, rejectionHandled) on the console which is very useful. Unfortunately those errors are not developer-friendly.