rsync -av /from/a/dir1/ /to/some/other/dir2/ --no-perms --no-owner --no-group --no-times --exclude=/from/a/dir1/excludeDir/
Use -avn to perform a dry run — it will only show the files that would have been transferred, and won’t actually copy anything.
Notice that if you use dir1/ and dir2/ (with the trailing slash) all of the files inside dir1 will be copied inside dir2. If you leave the slash out, you will also copy the dir1 directory itself.
References:
Copy new files only – is this possible? Basically want to merge two folders
rsync ignore owner, group, time, and perms
