I've got like 500 images to resize, I'm not going to do that in gimp, a terminal solution would suit me best. I'm on ubuntu 14.04.
I've read this question about batch resizing using Imagemagick and I guess that is partly what I'm after (I don't care about the recursive part). I need to resize all images so that the longest side of the image will be say 600 pixels. There are images where that will be the width and some where that is the height.
So I guess something like:
find . -name "*.jpg" | xargs convert -resize ...
Any ideas?