I have a entire folder of nearly 4000 pdf files that had gotten accidentally scanned into pdf files instead of jpg by a co worker. we were scanning nearly 7000 paper files and at some point second shift somehow changed the saves to pdf.
This was originally done in windows, I have been chasing a way to correct this for over a week and everyone says use Linux, along the way i had installed mint, then dumped that for Ubuntu. I know nothing about command line.
All I need is a simple command to make this convert the contents of the entire folder. the problem being out of all the files that were scanned we don't know from the originals which ones were done correctly and which ones were done as pdf or we could just re scan them -- all the pdf files are separated in a folder by themselves.
I have no idea what to type, where to type it at or how to get this to work. Help please!