revnetgroup Command

Purpose

Reverses the listing of users and hosts in network group files in NIS maps.

Syntax

/usr/sbin/revnetgroup { -h | -u } [ File ]

Description

The revnetgroup command reverses the order in which hosts and users are listed in the /etc/netgroup file. The revnetgroup command is called from the /var/yp/Makefile file to produce output for creating either the netgroup.byuser or netgroup.byhost NIS map. Each line in the output file begins with a key formed by concatenating the host or user name with the domain name. Following the key is a list of groups to which the host or user belongs. The list is preceded by a tab, and each group is separated by a comma.

Note: The list of groups does not use the names of universal groups (groups that include all users in the network). Universal groups are listed under * (asterisk).

The revnetgroup command takes an optional file name if the default /etc/netgroup file is not desired. This feature provides users with flexibility to create custom network group maps.

Flags

Item	Description
-h	Produces output for creating the netgroup.byhost map.
-u	Produces output for creating the netgroup.byuser map.

Examples

To cause the /etc/netgroup file to list user names before host names, modify the appropriate stanza in the /var/yp/Makefile to read:
```
revnetgroup -u
```
To create a new network group file, called newgroup, in the /etc directory, modify the appropriate stanza in the /var/yp/Makefile to read:
```
revnetgroup -h newgroup
```
The -h flag used in this example causes the new /etc/newgroup file to list host names before user names.

Files

Item	Description
/etc/netgroup	Contains lists of users and hosts in network groups.
/var/yp/Makefile	Contains rules for making NIS maps.