@@ -43,7 +43,7 @@ func main() {

 		flMtu                = flag.Int([]string{"#mtu", "-mtu"}, docker.DefaultNetworkMtu, "Set the containers network mtu")

 	)

 	flag.Var(&flDns, []string{"#dns", "-dns"}, "Force docker to use specific DNS servers")

-	flag.Var(&flHosts, []string{"H", "-host"}, "Multiple tcp://host:port or unix://path/to/socket to bind in daemon mode, single connection otherwise")

+	flag.Var(&flHosts, []string{"H", "-host"}, "tcp://host:port, unix://path/to/socket, fd://* or fd://socketfd to use in daemon mode. Multiple sockets can be specified")

 	flag.Parse()

@@ -27,7 +27,7 @@ To list available commands, either run ``docker`` with no parameters or execute

     Usage of docker:

       -D, --debug=false: Enable debug mode

-      -H, --host=[]: Multiple tcp://host:port or unix://path/to/socket to bind in daemon mode, single connection otherwise

+      -H, --host=[]: Multiple tcp://host:port or unix://path/to/socket to bind in daemon mode, single connection otherwise. systemd socket activation can be used with fd://[socketfd].

       --api-enable-cors=false: Enable CORS headers in the remote API

       -b, --bridge="": Attach containers to a pre-existing network bridge; use 'none' to disable container networking

       --bip="": Use this CIDR notation address for the network bridge's IP, not compatible with -b

@@ -63,6 +63,8 @@ the ``-H`` flag for the client.

         # both are equal

+To run the daemon with socket activation, use ``docker -d -H fd://*``. Individual sockets can also be specified ``docker -d -H fd://3``.

+

 .. _cli_attach:

 ``attach``