Merge pull request #2812 from Rachid-Koucha/patch-7

templates/lxc-busybox.in

@@ -164,7 +164,10 @@ case "\$1" in
 
     [ -n "\$domain" ] && echo search \$domain > /etc/resolv.conf
     for i in \$dns ; do
-      echo nameserver \$i >> /etc/resolv.conf
+      grep "nameserver \$i" /etc/resolv.conf > /dev/null 2>&1
+      if [ \$? -ne 0 ]; then
+        echo nameserver \$i >> /etc/resolv.conf
+      fi
     done
     ;;
 esac