defines network groups
“netgroups”, which are sets of (host,
tuples that are to be given similar network access.
Each line in the file consists of a netgroup name followed by a list of the
members of the netgroup. Each member can be either the name of another
netgroup or a specification of a tuple as follows:
where the host
are character string names for the
corresponding component. Any of the comma separated fields may be empty to
specify a “wildcard” value or may consist of the single
character “-” to specify “no valid value”. The
members of the list may be separated by whitespace; the “\”
character may be used at the end of a line to specify line continuation. The
functions specified in
should normally be used to access the
These functions operate on the Berkeley DB version of the
) file which can be generated
If that file is not present, and the system supports NIS, then the
NIS maps are used. The NIS maps
are also used if the
a “+” entry.
Lines that begin with a ‘
’ are treated as
- default netgroup list
- netgroup database
The file format is compatible with that of various vendors, although it appears
that not all vendors use an identical format.
The interpretation of access restrictions based on the member tuples of a
netgroup is left up to the various network applications.