systemd-activate

       /lib/systemd/systemd-activate [OPTIONS...] daemon [OPTIONS...]

DESCRIPTION
       systemd-activate may be used to launch a socket-activated service
       binary from the command line for testing purposes. It may also be used
       to launch individual instances of the service binary per connection.

       The daemon to launch and its options should be specified after options
       intended for systemd-activate.

       If the --inetd option is given, the socket file descriptor will be used
       as the standard input and output of the launched process. Otherwise,
       standard input and output will be inherited, and sockets will be passed
       through file descriptors 3 and higher. Sockets passed through
       $LISTEN_FDS to systemd-activate will be passed through to the daemon,
       in the original positions. Other sockets specified with --listen= will
       use consecutive descriptors. By default, systemd-activate listens on a
       stream socket, use --datagram and --seqpacket to listen on datagram or
       sequential packet sockets instead (see below).

OPTIONS
       -l address, --listen=address
           Listen on this address. Takes a string like "2000" or
           "127.0.0.1:2001".

       -a, --accept
           Launch an instance of the service binary for each connection and
           pass the connection socket.

       -d, --datagram
           Listen on a datagram socket (SOCK_DGRAM), instead of a stream
           socket (SOCK_STREAM). May not be combined with --seqpacket.

       --seqpacket
           Listen on a sequential packet socket (SOCK_SEQPACKET), instead of a
           stream socket (SOCK_STREAM). May not be combined with --datagram.

       --inetd
           Use the inetd protocol for passing file descriptors, i.e. as
           standard input and standard output, instead of the new-style
           protocol for passing file descriptors using $LISTEN_FDS (see
           above).

       -E VAR[=VALUE], --setenv=VAR[=VALUE]
           Add this variable to the environment of the launched process. If
           VAR is followed by "=", assume that it is a variable-value pair.
           Otherwise, obtain the value from the environment of
           systemd-activate itself.

       --fdname=NAME
           Specify a name for the activation file descriptors. This is
           equivalent to setting FileDescriptorName= in socket unit files, and
           enables use of sd_listen_fds_with_names(3).

           Same as in systemd(1).

EXAMPLES
       Example 1. Run an echo server on port 2000

           $ /lib/systemd/systemd-activate -l 2000 --inetd -a cat

       Example 2. Run a socket-activated instance of systemd-journal-
       gatewayd(8)

           $ /lib/systemd/systemd-activate -l 19531 /lib/systemd/systemd-journal-gatewayd

SEE ALSO
       systemd(1), systemd.socket(5), systemd.service(5), sd_listen_fds(3),
       sd_listen_fds_with_names(3), cat(1)

systemd 229                                                SYSTEMD-ACTIVATE(8)
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