revnetgroup - generate reverse netgroup data

revnetgroup was written by Thorsten Kukuk <kukuk@linux-nis.org>.

NIS Reference Manual                               12/31/2020                                     REVNETGROUP(8)

Revnetgroup processes the standard input in netgroup(5) format into what is called reversenetgroup 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.

       /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.

       revnetgroup - generate reverse netgroup data

-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.

getnetgrent(3), netgroup(5),

/usr/lib/yp/revnetgroup [-u | -h]