For folks trying to get a working low-profile external fingerprint reader on Linux: Search for “cs9711” and presume you’re buying from either AliExpress or Temu. Everything else is either huge or not supported.
I just got mine in. Works perfect. Here’s the installer you need.
https://github.com/Ziomal12/libfprint-CS9711
I should note: You need to be very careful when buying, as most of the external Windows 11 readers do not support libfprint. If you need something more secure than this a YubiKey is probably a better bet, but this is a great way to avoid having to type in your password dozens of times in a command line. Plus, you can take the fingerprint reader with you, so it works as a second factor.
Ernie Smith