-R, --relative use relative path names
-b, --backup make backups (default ~ suffix)
--backup-dir make backups into this directory
- --suffix=SUFFIX override backup suffix
+ --suffix=SUFFIX define backup suffix
-u, --update update only (don't overwrite newer files)
-l, --links copy symlinks as symlinks
-L, --copy-links copy the referent of symlinks
dit(bf(--backup-dir=DIR)) In combination with the --backup option, this
tells rsync to store all backups in the specified directory. This is
-very useful for incremental backups.
+very useful for incremental backups. You can additionally
+specify a backup suffix using the --suffix option
+(otherwise the files backed up in the specified directory
+will keep their original filenames).
dit(bf(--suffix=SUFFIX)) This option allows you to override the default
backup suffix used with the -b option. The default is a ~.
+If --backup-dir and --suffix are both specified,
+the SUFFIX is appended to the filename even in the backup directory.
dit(bf(-u, --update)) This forces rsync to skip any files for which the
destination file already exists and has a date later than the source