NETGROUP(5) BSD File Formats Manual NETGROUP(5)
netgroup -- defines network groups
The netgroup file specifies ``netgroups'', which are sets of (host, user,
domain) 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:
(host, user, domain)
where the host, user, and domain are character string names for the cor-
responding 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 getnetgrent(3)
should normally be used to access the netgroup database.
These functions operate on the db(3) version of the netgroup
(netgroup.db) file which can be generated using netgroup_mkdb(8). If
that file is not present, and the system supports NIS, then the netgroup
NIS maps are used. The NIS maps are also used if the netgroup file con-
tains a ``+'' entry.
Lines that begin with a '#' are treated as comments.
/etc/netgroup default netgroup list
/etc/netgroup.db netgroup database
getnetgrent(3), exports(5), netgroup_mkdb(8)
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.
BSD April 25, 2017 BSD