HOST_GROUP defines a group of hosts for use in INCLUDE, INCLUDEALL, INCLUDE_ENTITLEMENT, EXCLUDE, EXCLUDEALL, EXCLUDE_ENTITLEMENT, and RESERVE option lines. Multiple HOST_GROUP lines add all the specified hosts into the group.
HOST_GROUP group_name host_list
Name of the group being defined. Host group names are case sensitive.
List of host names in that group. Names are case sensitive.
To define the host group Pacific consisting of tokyo, seattle, and auckland, this is the option line:
HOST_GROUP Pacific tokyo seattle auckland
Anywhere a host name can be used in an options file, an IP address can be used instead.