netgroup(NF)                    19 June 1992                    netgroup(NF)


 Name

    netgroup - list of network groups

 Description

    netgroup defines network-wide groups.  It is used for permission checking
    when doing remote mounts, remote logins, and remote shells.  For remote
    mounts, the information in netgroup is used to classify machines; for
    remote logins and remote shells, it is used to classify users.  Each line
    of the netgroup file defines a group and has the format

       groupname member1 member2 ...

    where memberi is either another group name, or a triple:

       (hostname, username, domainname)

    Any of three fields can be empty, in which case it signifies a ``wild
    card.'' Thus

       universal (,,)

    defines a group to which everyone belongs.  Field names that begin with
    something other than a letter, digit, or underscore (such as ``-'') work
    in precisely the opposite fashion. For example, consider the following
    entries:

       justmachines    (analytic,-,sun)
       justpeople      (-,babbage,sun)

    The machine, analytic, belongs to the group, justmachines, in the domain,
    sun, but no users belong to it.  Similarly, the user, babbage, belongs to
    the group, justpeople, in the domain, sun, but no machines belong to it.

    Network groups are contained in the network information service and are
    accessed through these files:

       /etc/yp/domainname/netgroup.dir
       /etc/yp/domainname/netgroup.pag
       /etc/yp/domainname/netgrp.usr.dir
       /etc/yp/domainname/netgrp.usr.pag
       /etc/yp/domainname/netgrp.hst.dir
       /etc/yp/domainname/netgrp.hst.pag

    These files can be created from /etc/netgroup using makedbm(NADM).

 Files


    /etc/netgroup
    /etc/yp/domainname/netgroup.dir
    /etc/yp/domainname/netgroup.pag
    /etc/yp/domainname/netgrp.usr.dir
    /etc/yp/domainname/netgrp.usr.pag
    /etc/yp/domainname/netgrp.hst.dir
    /etc/yp/domainname/netgrp.hst.pag


 Notes

    This file is dependent on the network transport mechanism used.

 See also

    makedbm(NADM), ypmapxlate(NF), ypserv(NADM)