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Command: netgroup | Section: 5 | Source: OpenBSD | File: netgroup.5
NETGROUP(5) FreeBSD File Formats Manual NETGROUP(5)
NAME
netgroup - defines network groups
DESCRIPTION
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
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.
Lines that begin with a `#' are treated as comments.
After modification of /etc/netgroup, netgroup_mkdb(8) should be run, as
the getnetgrent(3) functions only operate on the Berkeley DB file
/etc/netgroup.db.
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 contains a "+" entry.
FILES
/etc/netgroup default netgroup list
/etc/netgroup.db netgroup database
EXAMPLES
Define a group of three machines:
friends (10.0.0.2,,) (10.0.0.3,,) (10.0.0.4,,)
This group can be used in exports(5) as follows:
/home -maproot=nobody friends
SEE ALSO
dbopen(3), getnetgrent(3), exports(5), netgroup_mkdb(8)
STANDARDS
The file format is compatible with that of various vendors, although it
appears that not all vendors use an identical format.
BUGS
The interpretation of access restrictions based on the member tuples of a
netgroup is left up to the various network applications.
FreeBSD 14.1-RELEASE-p8 January 25, 2020 FreeBSD 14.1-RELEASE-p8