I have two similar directories and I want to compare them to see what would be copied.
Normall I would cd to a dir and then just run the command:
find . -print | cpio -pdvm /foo/bar
but I cannot recall and worse find in the man to set cpio to read-only -- meaning just show me what it would have done. My memory tells me that I used to be able to do this. But I might have dreamt it since I cannot recall the last time I actually used that option.