ypbind - NIS binding process


   ypbind  [ -c ] [ -d|-debug ] [ -broadcast ] [ -broken-server ] [ -ypset
   ] [ -ypsetme ] [ -no-ping ] [ -f configfile ] [ -local-only ] [  -ping-
   interval ping-interval ] [ -no-dbus ]

   ypbind --version


   ypbind  finds  the server for NIS domains and maintains the NIS binding
   information. The client (normally the NIS routines in  the  standard  C
   library)  could  get  the  information over RPC from ypbind or read the
   binding  files.  The   binding   files   resides   in   the   directory
   /var/yp/binding  and  are  conventionally named [domainname].[version].
   The supported versions are 1 and 2.  There could be several such  files
   since  it  is  possible  for an NIS client to be bound to more than one

   After a binding has been established, ypbind  will  send  YPPROC_DOMAIN
   requests  to  the  current  NIS  server  at 20 seconds intervals. If it
   doesn't get an response or the NIS server reports that he doesn't  have
   this domain any longer, ypbind will search for a new NIS server. All 15
   minutes ypbind will check to see if  the  current  NIS  server  is  the
   fastest.  If  it  find a server which answers faster, it will switch to
   this server.  You could tell ypbind to use network broadcasts to find a
   new  server,  what  is  insecure,  or you could give it a list of known
   secure servers.  In this case ypbind will send a ping  to  all  servers
   and binds to first one which answers.

   Unless  the  option  -debug  is  used,  ypbind detaches itself from the
   controlling terminal and puts  itself  into  background.   ypbind  uses
   syslog(3)  for  logging  errors  and  warnings.   At  startup  or  when
   receiving signal SIGHUP, ypbind parses the file /etc/yp.conf and  tries
   to use the entries for its initial binding.

   A   broadcast   entry  in  the  configuration  file  will  overwrite  a
   ypserver/server entry and a ypserver/server  entry  broadcast.  If  all
   given server are down, ypbind will not switch to use broadcast.  ypbind
   will try at first /etc/hosts and then DNS for resolving the hosts names
   from /etc/yp.conf.  If ypbind couldn't reconfigure the search order, it
   will use only DNS.  If DNS isn't available,  you  could  only  use  IP-
   addresses  in  /etc/hosts.   ypbind  could  only reconfigure the search
   order with glibc 2.x.  If the -broadcast option  is  specified,  ypbind
   will  ignore  the configuration file.  If the file does not exist or if
   there are no valid entries, ypbind exit.

   This ypbind version listens for DBUS messages from  NetworkManager.  If
   no  NetworkManager  is  running at startup, ypbind will behave as usual
   and assumes there is a working network connection. If NetworkManager is
   running  on  the  system,  ypbind  will  only  search  and  provide NIS
   informations, if NetworkManager tells  that  a  network  connection  is
   available.  If  NetworkManager  establishes  a  connection, ypbind will
   reread all configuration files, registers at the local  portmapper  and
   try to search NIS servers. If NetworkManager drops a connection, ypbind
   will unregister from portmapper.


          Send a broadcast to request the information needed to bind to  a
          specific  NIS  server.  With  this  option, /etc/yp.conf will be

   -ypset Allow root from any remote machine to change the binding  for  a
          domain  via  the ypset(8) command. By default, no one can change
          the binding. This option is really insecure.  If  you  change  a
          binding  for  a  domain,  all the current known servers for this
          domain will be forgotten. If the new server  goes  down,  ypbind
          will use the old searchlist.

          The  same  as  -ypset,  but  only  root  on the local machine is
          allowed to change the binding. Such requests  are  only  allowed
          from loopback.

   -c     ypbind  only  checks  if  the  config file has syntax errors and

   -debug starts ypbind in debug mode.  ypbind will not  put  itself  into
          background,  and  error messages and debug output are written to
          standard error.

          lets ypbind accept answers from servers running  on  an  illegal
          port  number. This should usually be avoided, but is required by
          some ypserv(8) versions.

          ypbind will not check if the binding is alive.  This  option  is
          for  use  with dialup connections to prevent ypbind from keeping
          the connection unnecessarily open or causing autodials.

   -f configfile
          ypbind will use configfile and not /etc/yp.conf

          ypbind will  only  bind  to  the  loopback  device  and  is  not
          reachable from a remote network.

   -ping-interval ping-interval
          The  default value for ypbind to check, if a NIS server is still
          reachable, is 20 seconds.  With this options  another  frequency
          in seconds can be specified.

          Disables DBUS support if compiled int.

          Prints the version number


          configuration file.

          binding file containing information about each NIS domain.

          contains  the  process id of the currently running ypbind master


   syslog(3),  domainname(1),  yp.conf(5),  ypdomainname(8),   ypwhich(1),
   ypserv(8), ypset(8)


   ypbind-mt was written by Thorsten Kukuk <kukuk@suse.de>.


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