6.2.6.6 HOST_GROUP name list-of-hostnames
The HOST_GROUP line defines a group of users to be used in an EXCLUDE, EXCLUDEALL, INCLUDE or INCLUDEALL line. Separate the hostnames in the list by spaces. Multiple lines that specify the same HOST_GROUP name will have their lists of hostnames concatenated.
Example:
HOST_GROUP corporate node_a node_b node_c
Example - This example results in a group of six hosts:
HOST_GROUP corporate node_a node_b node_c
HOST_GROUP corporate node_d node_e node_f