I’m pleased to see this as I have been working on some shell scripts for managing a collection of research PDFs myself. But I think the headline’s a little misleading. The scripts don’t do much more to help you avoid journal webpages than feed a DOI into Sci-Hub. If the material you’re collecting isn’t on Sci-Hub, or breaching the publisher’s copyright is likely to cause problems for you at work, then these tools aren’t useful.