ChorusOS 5.0 System Administrator's Guide

Setting Up the Configuration Files

Unless you build the following files into your system image, they probably reside in build_dir/root/etc, which you generate using the make root command in the directory where you build system images.

Make sure /etc/exports specifies all the file systems located on the ChorusOS system that you plan to export through NFS. Entries in the /etc/exports file follow the form:
```
export_dir options
```
where export_dir indicates a file system to export, and options allows you to specify whether any directory under export_dir can be mounted by another system, which users, groups or netgroups have access to export_dir, whether the directory should be exported read-only and so forth. See exports(4CC) for details.

Make sure /etc/hosts contains the IP addresses and hostnames of NFS clients. Entries in the /etc/hosts file follow the form:
```
IP_address hostname [other_hostname ...]
```
where IP_address is the IP address of the system, hostname is the hostname of the system and other_hostnames are alternate hostnames. See hosts(4CC) for details.

Make sure /etc/netgroup is readable by everyone, and contains descriptions of all netgroups -- sets of hosts, users and domains -- used in /etc/exports. Entries in the /etc/netgroup file follow the form:
```
netgroup (hosts,users,domains)
```
where netgroup is the name of the group, hosts specifies the hostnames of the systems in the group, users specifies the users in the group, and domains specifies the domains that belong to the group. See netgroup(4CC) for details.

Make sure /etc/networks contains correct information about available networks. Entries in the /etc/networks file follow the form:
```
network_name network_number network_aliases
```
where network_name is the primary name for the network, network_number is the IP network number prefix, such as 127 for loopback or 192.33.15 for a specific class-C network, and network_aliases are alternate names for the network. See networks(4CC) for details.