/usr/bin/rsync -azAX /opt/dir/ 192.168.0.16:/opt/dir/
-a, --archive           archive mode; equals -rlptgoD (no -H,-A,-X)
  -r, --recursive         recurse into directories
  -l, --links             copy symlinks as symlinks
  -p, --perms             preserve permissions
  -t, --times             preserve modification times
  -g, --group             preserve group
  -o, --owner             preserve owner (super-user only)
  -D                      same as --devices --specials
    --devices           preserve device files (super-user only)
    --specials          preserve special files
-z, --compress          compress file data during the transfer
-A, --acls              preserve ACLs (implies -p)
-X, --xattrs            preserve extended attributes