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（一）跟我一起玩linux網絡服務：DNS服務——BIND（/etc/named.conf、/var/named)設置實現和解釋

 1 #! /bin/bash 2 ip="10.10.10" 3 RIP="10.10.10" 4 DN="gr.org" 5 Name="10.10.10.10" 6  7 cat >> /etc/named.conf << +END+ 8 zone "$DN." IN { 9         type master;10         file "gr.org.db";11 };12 zone "$RIP.in-addr.arpa" IN{13         type master;14         file "$IP.db";15 };16 +END+17 cat > /var/named/$DN.db <<+END+18 /$TTL 8640019 @    IN  SOA    ns.$DN.  root.$DN. (20        20150317  6H  30M  1W  15M)21      IN  NS     ns.$DN.22      IN  MX  10   mail.$DN.23 bbs  IN  CNAME  www.$DN.24 ns   IN  A      $IP.1025 www  IN  A      $IP.1026 mail IN  A      $IP.1127 +END+28 cat > /var/named/$IP.db <<+END+29 /$TTL 8640030 @       IN      SOA     ns.$DN.       root.$DN.(31                 20150317  6H  30M  1W  15M)32         IN      NS      ns.$DN.33 10      IN      PTR     ns.$DN.34 10      IN      PTR     www.$DN.35 11      IN      PTR     mail.$DN.36 +END+37 cat > /etc/resolv.conf <<+END+38 nameserver $Name39 +END+40 41 service named start