* [[servers:linux:vsftpd#fstab|vsftpd - fstab]]

  * https://unix.stackexchange.com/questions/67539/how-to-rsync-only-new-files
  * https://stackoverflow.com/questions/15787676/rsync-how-to-do-a-checksum-on-rsync

<code>rsync --verbose --recursive --update --ignore-existing --progress '/var/ftp/nas1/' '/var/ftp/nas2/'</code>

<code>--checksum</code>