dhisd(8) [debian man page]

DHISD(8)						    BSD System Manager's Manual 						  DHISD(8)

NAME

     dhisd -- Dynamic Host Information System server.

SYNOPSIS

     dhisd [-D] [-p port] [-d database] [-s services] [-l logfile] [-P pidfile]

DESCRIPTION

     DHIS is a client-server architecture meant to update databases for systems which are assigned a dynamic IP[v4] address.

     By the means of a DHIS client a host which is assigned a dynamic IP address (either from its ISP or from DHCP) is able to communicate with a
     DHIS server in order to advertise its newly acquired IP address.

     DHIS comprises a UDP based protocol to achieve this purpose.

     A DHIS client has a unique identification number and a set of authentication keys, runs in background, and attempts to reach its server.

     The DHIS server (permanently online) listens to UDP messages from its clients and authenticates these against its knowledge of keys. When
     authentication is successful the DHIS server updates one or more databases with the newly received IP address for the given client.

     The server then keeps sending, every period of time, check requests to each of its connected clients. These need to be acknowledged. If not
     the server will consider, on an individual basis, that the client has disconnected and will again update the databases to an offline state.

     Alternativelly the server may receive an OFFLINE_REQ packet from the client, in which case the DNS record is updated at once and the online
     state droped.

OPTIONS

     -D      Increase debug level.

     -p port
	     Specify port to listen on. If not specified, the default is port 58800.

     -d database
	     Use an alternative database file instead of /etc/dhis-server/dhis.db.

     -s services
	     Use an alternative database file instead of /etc/dhis-server/services.db.

     -l logfile
	     Use an alternative log file instead of /var/log/dhisd.log.

     -P pidfile
	     Use an alternative PID file instead of /var/run/dhisd.pid.

FILES

     /etc/dhis-server/dhis.db
	     DHIS client database.  Contains the credentials of clients.

     /etc/dhis-server/services.db
	     DHIS service database.  Contains a list of services and the location of the corresponding DHIS engine plugins.

SEE ALSO

     dhis-genkeys(8)

AUTHOR

     dhisd has been written by Joao Cabral <jcnc@dhis.org>.

     This manual page was written by Guus Sliepen <guus@debian.org> for the Debian GNU/Linux system.

Debian GNU/Linux						   June 1, 2019 						  Debian GNU/Linux

NETDUMP-SERVER(8)						  System Programs						 NETDUMP-SERVER(8)

NAME

       netdump-server - handle crash dumps over the network

SYNOPSIS

       netdump-server [--port portnumber]
		[--concurrent number]
		[--pidfile path]
		[--daemon]
		[--help] [--usage]

DESCRIPTION

       Listens	to  the network for clients that crashes and uses the netdump protocol to recieve a memory dump and a stack trace. The memory dump
       and oops message are stored in a timestamped directory in /var/crash.  The server can also run scripts when some events happen.

OPTIONS

       --port portnumber
	      Specifies the IP port number for the netdump server to listen to.  The default is 6666.

       --concurrent number
	      You can limit the amount of concurrent dumps being done at any one time. If more clients than the specified maximum connects at  one
	      time the last ones will just be logged and then rebooted.

       --pidfile path
	      Store a pidfile.	The default service uses /var/run/ttywatch.pid.  The default is not to write a pidfile.

       --daemon
	      ttywatch should background itself and run as a daemon.

EXAMPLES

       netdump-server --daemon
       This launches the netdump-server and puts it in the background, listening for crashed clients.

EXIT STATUS

       Exit status is 0 for a clean exit and non-0 for a non-clean exit.

FILES

       /etc/netdump.conf
	      A  configuration	file  read  by netdump-server on startup. It is a "key=value" style file. Currently it supports the options: port,
	      max_concurrent_dumps, daemon and pidfile.

       /etc/init.d/netdump-server
	      An init script to start a default system installation of netdump-server.	This is normally turned off by default; use the command
	      /sbin/chkconfig netdump-server on
	      to enable the netdump-server service.

       /var/crash
	      The main directory where the crash dump files are stored. Each dump is put in a subdirectory  named  with  the  ip  of  the  crashed
	      machine and the date and time of the crash.

       /var/crash/scripts
	      This  directory  can contain scripts that are run at various times.  They all get passed the ip of the crashing machine as the first
	      argument, and each one except netdump-start gets the directory that the dump is written into as the second argument.

	      netdump-start - This is called when a client connects to the server to tell it that it has just started  the  netdump  client.  This
	      normally means that the machine just booted up.

	      netdump-crash  -	This  is  run  when a client reports that it has crashed.  If it returns a non-zero value the dump request will be
	      ignored and the client will be told to reboot immediately

	      netdump-nospace - This is run when there is not enough diskspace for the dump of the crashed machine. If this script  exits  with  a
	      non-zero return value netdump-server will try once again (but only once) before giving up the dump. If this script exits with a zero
	      return value, netdump-server will reboot the client without performing a dump.

	      netdump-reboot - This is run when netdump-server is finished with a client and is about to tell the client to reboot itself.

SEE ALSO

       netdump(8)

BUGS

       Report any bugs you find to http://bugzilla.redhat.com/bugzilla

AUTHOR

       Alexander Larsson <alexl@redhat.com>

Linux								    14 Feb 2002 						 NETDUMP-SERVER(8)