The AuthGroupFile directive sets the name of a textual file containing the list of user groups for user authentication. Filename is the path to the group file. If it is not absolute (i.e., if it doesn't begin with a slash), it is treated as relative to the ServerRoot.
Each line of the group file contains a groupname followed by a colon, followed by the member usernames separated by spaces. Example:
mygroup: bob joe anne
Note that searching large text files is very inefficient;
AuthDBMGroupFile
should be used instead.
Security: make sure that the AuthGroupFile is stored outside the document tree of the web-server; do not put it in the directory that it protects. Otherwise, clients will be able to download the AuthGroupFile.
See also AuthName, AuthType and AuthUserFile.