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netgroup(5yp) [ultrix man page]

netgroup(5yp)															     netgroup(5yp)

       netgroup - list of network groups

       The  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 file is used to classify machines; for remote logins and remote shells, it is used to classify users.   Each
       line of the file defines a group and has the following format:

       groupname member1,...,member_n

       Each member is either another group name or a combination of the host name, user name, and domain name.

       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 file:
       universal (,,)

       Field names that begin with something other than a letter, digit, or underscore (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 Yellow Pages data base and are accessed through these files:


       These files can be created from using


See Also
       getnetgrent(3yp), makedbm(8yp), ypserv(8yp)


Check Out this Related Man Page

REVNETGROUP(8)							 Reference Manual						    REVNETGROUP(8)

revnetgroup - generate reverse netgroup data SYNOPSIS
/usr/lib/yp/revnetgroup [-u|-h] DESCRIPTION
Revnetgroup processes the standard input in netgroup(5) format into what is called reverse netgroup form. That is, where the original file shows netgroup memberships in terms of which members reside in a particular group, the reverse netgroup format specifies what groups are associated with a particular member. This information is used to generate the netgroup.byuser and netgroup.byhosts NIS maps. These reverse netgroup maps are used to help speed up netgroup lookups, particularly for the innetgr library function. The revnetgroup command prints its results on the standard output. It is usually called only by /var/yp/Makefile when rebuilding the NIS netgroup maps. OPTIONS
The revnetgroup command supports the following options: -u Generate netgroup.byuser output; only username information in the original netgroup file is processed. -h Generate netgroup.byhost output; only hostname information in the original netgroup file is processed. Note at least one of the both flags must be specified. FILES
/var/yp/Makefile The Makefile to build the NIS databases /etc/netgroup the default netgroup database file. This file is most often found only on the NIS master server SEE ALSO
getnetgrent(3), netgroup(5), AUTHOR
revnetgroup was written by Thorsten Kukuk <>. YP Server August 2001 REVNETGROUP(8)
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