The runtime utilities and daemons look for configuration files and log files at certain default locations. These default locations can be overridden by environment variables or by entries in the site file. The utilities and daemons will look first for an environment variable. If one is not defined they will look for a site file definition. If there is no site file definition they will use a default value.
Chapter 11 describes the site file entries in detail. The site file entry is simply a line of text listing the environment variable name followed by the environment variable value.
Utilities and daemons search for the site file at the location specified by the environment variable SITE_FILE. If that environment variable is not defined, they look for the site file at /cplant/etc/site .