Diff on a folder structure

You can simple check which files that differ in a folder structure as follows:

diff -r ./A ./B

If you only want to see files that differ add -q parameter.

diff -qr ./A ./B

If you to do a different operation on the pairs of diffing files you may use some other tools for that.

diff -qr ./A ./B | grep 'Files; | cut -d' ' -f2,4 | xargs -n2 diff

-n2 is used to make sure that xargs does not treat lines with