I always do a mutual sync by issuing always "rsync -avuzb src dest" and then "rsync -avuzb dest src". If I use "rsync -avuzb ", already existing files are renamed to ~ on the destination, due to the b option. Now assume I have two files file and file~ on both, src and dst. The mutual sync now renames file~ to file~~ on each side. Although this is logically correct is is not practically desireble for me, since this means that the ~~~~~-files are piling up at each backup. Is there a way to only have one backup-file?