netgroup(5yp) [ultrix man page]

netgroup(5yp)															     netgroup(5yp)

Name
       netgroup - list of network groups

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

       groupname member1,...,member_n

       Each member is either another group name or a combination of the host name, user name, and domain name.

       Any  of	the three fields can be empty, in which case a wildcard is assumed.  For example, to define a group to which everyone belongs, the
       following entry could appear in the file:
       universal (,,)

       Field names that begin with something other than a letter, digit, or underscore (such as ``-'') work in the opposite way.  For example:
       justmachines   (analytica,-,suez)
       justpeople     (-,babbage,suez)

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

       Network groups are part of the Yellow Pages data base and are accessed through these files:

       /etc/yp/domainname/netgroup.dir
       /etc/yp/domainname/netgroup.pag
       /etc/yp/domainname/netgroup.byuser.dir
       /etc/yp/domainname/netgroup.byuser.pag
       /etc/yp/domainname/netgroup.byhost.dir
       /etc/yp/domainname/netgroup.byhost.pag

       These files can be created from using

Files
       /etc/netgroup
       /etc/yp/domainname/netgroup.dir
       /etc/yp/domainname/netgroup.pag
       /etc/yp/domainname/netgroup.byuser.dir
       /etc/yp/domainname/netgroup.byuser.pag
       /etc/yp/domainname/netgroup.byhost.dir
       /etc/yp/domainname/netgroup.byhost.pag

See Also
       getnetgrent(3yp), makedbm(8yp), ypserv(8yp)

																     netgroup(5yp)

netgroup(5)						      Linux Reference Manual						       netgroup(5)

NAME

       netgroup - specify network groups

DESCRIPTION

       The  netgroup  file   defines  "netgroups",  which  are sets of (host, user, domain) tuples, used for permission checking when doing remote
       mounts, remote logins and remote shells.

       Each line in the file consists of a netgroup name followed by a by a list of members, where a member is either another netgroup name, or  a
       triple:

	      (host, user, domain)

       where  the  host,  user,  and domain are character strings for the corresponding components. Any of the three fields can be empty, in which
       case it specifies a "wildcard", or may consist of the string "-" to specify "no valid value". The domain field must  either  be	the  local
       domain name or empty for the netgroup entry to be used. This field does not limit the netgroup or provide security. The domain field refers
       to the domain in which the triple is valid, not the domain containing the the trusted host.

       A gateway machine should be listed under all possible hostnames by which it may be recognized:

	      gateway (server,,) (server-sn,,) (server-bb,,)

       The getnetgrent functions should normally be used to access the netgroup database.

FILES

       /etc/netgroup

SEE ALSO

       getnetgrent(3), exports(5), makedbm(8), ypserv(8)

WARNINGS

       The triple (,,domain) allows all users and machines trusted access, and has the same effect as the triple  (,,).  Use  the  host  and  user
       fields of the triple to restrict the access correctly to a specific set of members.

BUGS

       The Linux libc5 does not query the /etc/netgroup file directly, it only querys the NIS server for the groups. So the netgroup database must
       be stored in the form of a hashed dbm database just like the passwd(5) and group(5) databases.

       This manpage mentions getnetgrent(3), but it seems that manpage hasn't been written yet. Since getnetgrent() is part of GNU libc  it  might
       also be that it is documented in info format.

AUTHOR

       Thorsten Kukuk <kukuk@suse.de>

NIS
								     May 1999							       netgroup(5)