-g, --group preserve group
-D, --devices preserve devices (root only)
-t, --times preserve times
+ -O, --omit-dir-times omit directories when preserving times
-S, --sparse handle sparse files efficiently
-n, --dry-run show what would have been transferred
-W, --whole-file copy whole files, no incremental checks
updated (though the rsync algorithm will make the update fairly efficient
if the files haven't actually changed, you're much better off using -t).
+dit(bf(-O, --omit-dir-times)) This tells rsync to omit directories when
+the preserving of modification times is enabled (see --times). If NFS
+is sharing the files on the receiving end, it is a good idea to use -O.
+
dit(bf(-n, --dry-run)) This tells rsync to not do any file transfers,
instead it will just report the actions it would have taken.