Sometimes when I'm copying important directory structure (with cp -rp) I want to make sure that each and every file was copied correctly, so I compare source directory structure with it's copy this way:
DIRR=<copied-dir-structure>; diff -u <(cd <path-where-source-dir-lies>; find "$DIRR" -type f -exec ls -al {} \;) <(cd <path-where-copied-dir-lies>; find "$DIRR" -type f -exec ls -al {} \;)