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     rbootd - HP remote boot server


     rbootd [-ad] [-i interface] [config_file]


     The rbootd utility services boot requests from Hewlett-Packard
     workstations over a local area network.  All boot files must reside in
     the boot file directory; further, if a client supplies path information
     in its boot request, it will be silently stripped away before processing.
     By default, rbootd only responds to requests from machines listed in its
     configuration file.

     The options are as follows:

     -a          Respond to boot requests from any machine.  The configuration
                 file is ignored if this option is specified.

     -d          Run rbootd in debug mode.  Packets sent and received are
                 displayed to the terminal.

     -i interface
                 Service boot requests on specified interface.  If
                 unspecified, rbootd searches the system interface list for
                 the lowest numbered, configured ‘‘up’’ interface (excluding
                 loopback).  Ties are broken by choosing the earliest match.

     Specifying config_file on the command line causes rbootd to use a
     different configuration file from the default.

     The configuration file is a text file where each line describes a
     particular machine.  A line must start with a machine’s Ethernet address
     followed by an optional list of boot file names.  An Ethernet address is
     specified in hexadecimal with each of its six octets separated by a
     colon.  The boot file names come from the boot file directory.  The
     ethernet address and boot file(s) must be separated by white-space and/or
     comma characters.  A pound sign causes the remainder of a line to be

     Here is a sample configuration file:

     # ethernet addr     boot file(s)        comments
     08:00:09:0:66:ad    SYSHPBSD            # snake (4.3BSD)
     08:00:09:0:59:5b                        # vandy (anything)
     8::9:1:C6:75        SYSHPBSD,SYSHPUX    # jaguar (either)

     Rbootd logs status and error messages via syslog(3).  A startup message
     is always logged, and in the case of fatal errors (or deadly signals) a
     message is logged announcing the server’s termination.  In general, a
     non-fatal error is handled by ignoring the event that caused it (e.g. an
     invalid Ethernet address in the config file causes that line to be

     The following signals have the specified effect when sent to the server
     process using the kill(1) command:

             SIGHUP   Drop all active connections and reconfigure.

             SIGUSR1  Turn on debugging, do nothing if already on.

             SIGUSR2  Turn off debugging, do nothing if already off.


                      configuration file
     /tmp/rbootd.dbg  debug output
     /var/lib/rbootd  directory containing boot files
                      process id


     kill(1), socket(2), signal(3), syslog(3),


     If multiple servers are started on the same interface, each will receive
     and respond to the same boot packets.  The interface should be specified
     in a configuration file rather than having to be put on the command line
     as an argument.  Also the location of the boot images is hardcoded into
     the binary at compile time.