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netgroup(4)							  netgroup(4)



NAME
  netgroup - List of network groups

DESCRIPTION

  The netgroup file defines network-wide groups	used for permission checking
  when doing remote mounts, remote logins, and remote shells.  For remote
  mounts, the information in the netgroup file is used to classify machines;
  for remote logins and	remote shells, it is used to classify users.  Each
  line of the netgroup file defines a group and	has the	following format:

  groupname member_1 ... member_n

  Each member can be either another group name or a combination	of the host
  name,	user name, and domain name in the following format:

  (hostname, username, domainname)

  Any of the three fields can be empty,	in which case a	wildcard is assumed.
  For example, to define a group to which everyone belongs, the	following
  entry	could appear in	the netgroup file:

       universal (,,)

  Field	names that begin with something	other than a letter, digit, or under-
  score	(such as ``-'')	work in	the opposite way.  For example:

       justmachines (analytica,-,suez)
       justpeople (-,babbage,suez)

  The machine analytica	belongs	to the group justmachines in the domain	suez,
  but no users belong to it.  Similarly, the user babbage belongs to the
  group	justpeople in the domain suez, but no machines belong to it.

  Network groups are part of the NIS database and are accessed through these
  files:

  /etc/yp/domainname/netgroup.dir
  /etc/yp/domainname/netgroup.pag
  /etc/yp/domainname/netgroup.byuser.dir
  /etc/yp/domainname/netgroup.byuser.pag
  /etc/yp/domainname/netgroup.byhost.dir
  /etc/yp/domainname/netgroup.byhost.pag

  These	files can be created from /etc/netgroup	using makedbm(8).

FILES

  /etc/netgroup
  /etc/yp/domainname/netgroup.dir
  /etc/yp/domainname/netgroup.pag
  /etc/yp/domainname/netgroup.byuser.dir
  /etc/yp/domainname/netgroup.byuser.pag
  /etc/yp/domainname/netgroup.byhost.dir
  /etc/yp/domainname/netgroup.byhost.pag




RELATED	INFORMATION

  getnetgrent(3), makedbm(8), ypserv(8)