Try Zotero. It is a complete literature databas but it’s PDF reader is very good at extracting images and text. Works on all OS, web and mobile. Native Linux client has been very smooth for me. Oh, terminal it doesn’t do though. If you want to extract a large amount in an automated way, its probably not the right tool.

What do you guys think about Eternal Terminal? I quite like it. You can scroll!

I usw Garuda with KDE and like it lot, even though I do not game.