Provided by: alfred_2015.2-1_amd64 bug


       alfred - Almighty Lightweight Fact Remote Exchange Daemon


       alfred [options]


       alfred is a user space daemon for distributing arbitrary local information over the
       mesh/network in a decentralized fashion. This data can be anything which appears to be
       useful - originally designed to replace the batman-adv visualization (vis), you may
       distribute hostnames, phone books, administration information, DNS information, the local
       weather forecast ...

       alfred runs as daemon in the background of the system. A user may insert information by
       using the alfred binary on the command line, or use special programs to communicate with
       alfred (done via unix sockets). alfred then takes care of distributing the local
       information to other alfred servers on other nodes. This is done via IPv6 link-local
       multicast, and does not require any configuration. A user can request data from alfred,
       and will receive the information available from all alfred servers in the network.


       -v, --version
              Print the version

       -h, --help
              Display a brief help message.

       -u, --unix-path path
              path to unix socket used for client-server communication.


       -s, --set-data data-type
              Sets new data to distribute from stdin for the supplied data type (0-255).

              Note that 0 - 63 are reserved (please send an e-mail to the authors if you want to
              register a datatype), and can not be used on the commandline. Information must be
              periodically written again to alfred, otherwise it will timeout and alfred will
              forget about it (after 10 minutes).

       -r, --request data-type
              Collect data from the network and prints it on the network

       -d, --verbose
              Show extra information in the data output

       -V, --req-version version
              Specify the data version set for -s

              Skipping the parameter entirely has the same effect as setting the parameter to 0
              ('-V 0').

       -M, --modeswitch mode
                  Switch daemon to mode master
                  Switch daemon to mode slave

       -I, --change-interface interface
              Change the alfred server to use the new interface(s)


       -i, --interface face
              Specify the interface (or comma separated list of interfaces) to listen on

       -b batmanif
              Specify the batman-adv interface configured on the system (default: bat0).  Use
              'none' to disable the batman-adv based best server selection.

              The -b option is optional, and only needed if you run alfred on a batman-adv
              interface not called bat0, or if you don't use batman-adv at all (use '-b none').
              In this case, alfred will still work but will not be able to find the best next
              master server based on metrics.

       -m, --master
              Start up the daemon in master mode, which accepts data from slaves and syncs it
              with other masters.

              alfred servers may either run as master or slave in the network. Masters will
              announce their status via broadcast, so that slaves can find them. Slaves will then
              send their data to their nearest master (based on TQ). Masters will exchange their
              data (which they have received from slaves or got on their own) with other masters.
              By using masters and slaves, overhead can be reduced while still keeping redundancy
              (by having multiple masters). Obviously, at least one master must be present in the
              network to let any data exchange happen. Also having all nodes in master mode is
              possible (for maximum decentrality and overhead).

       -c, --update-command command
              Specify command to execute on data change. It will be called with data-type list as


       Start an alfred server listening on bridge br0 (assuming that this bridge includes the
       batman interface bat0):
            alfred -i br0 -m

       Send data to the alfred server and store it under id 65:
            cat /etc/hostname | alfred -s 65

       Retreive all data stored as id 65 from all connected alfred servers:
            alfred -r 65
            { "fe:f1:00:00:01:01", "OpenWRT-node-1\x0a" },
            { "fe:f1:00:00:02:01", "OpenWRT-node-2\x0a" },
            { "fe:f1:00:00:03:01", "OpenWRT-node-3\x0a" },


       batadv-vis(8), batctl(8)


       alfred was written by Simon Wunderlich <> and Sven Eckelmann

       This manual page was written by Simon Wunderlich <> and Sven
       Eckelmann <>.