hash_backup

    usage: md5backup [options]

    optional arguments:
      -h, --help            show this help message and exit
      --primary [CONFIG [CONFIG ...]]
                            backup as specified in CONFIG
      --secondary SOCKET MOUNT PATH
                            backup from SOCKET to MOUNT/PATH2
      --xattr               let md5toc store MD5 in extended attribute
      --max-age SECONDS     maximum SECONDS since last MD5 calculation
      --user USER           ssh USER for secondary (-l)
      --identity IDENTITY   ssh IDENTITY for secondary (-i)
      --debug               debug actions