-r, --recursive recurse into directories
-R, --relative use relative path names
--no-relative turn off --relative
--no-implied-dirs don't send implied dirs with -R
-b, --backup make backups (see --suffix & --backup-dir)
-r, --recursive recurse into directories
-R, --relative use relative path names
--no-relative turn off --relative
--no-implied-dirs don't send implied dirs with -R
-b, --backup make backups (see --suffix & --backup-dir)