File /etc/netgroup defines "netgroups", which are sets of
(host, user, domain) tuples, used for permission checking when doing
remote mounts, remote logins and remote shells.
The netgroup file entries on the NIS server look like this:
netgroup (host,user,domain) (host,user,domain) ..
For example a netgroup for powerusers could be:
powerusers (,samf,) (,tomk,) (,johns,)
And an entry in the /etc/password file on a NIS client like
+@powerusers::::::
+:*:::::/etc/NoShell
Note, in /var/yp/Makefile on the server, netgr map
has to be included
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