Earlier this year, Flickr locked its automatic uploading feature that pulls image files off an SD card and automatically uploads them to Flickr behind a paywall. If you don’t want to shell out the $US5.99 ($8)/month for that, GitHub user drcursor has a solution that uses a Raspberry Pi.
Essentially, all you’re doing here is making a simple Python script that will upload all the photo files from a USB drive to Flickr (with the viewing set to private) when it’s connected to the Pi. When it’s done, the script sends you an email to say it’s ready then unmounts the storage device. It’s a very simple little program, but if you’re annoyed at Flickr’s paywall but still use the service, this is a nice way around it.