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linuxコマンドメモ(dig)

More than 3 years have passed since last update.

※記載内容はメモとして作成しているため、修正が必要な部分があるかもしれません。

digコマンド メモ

指定したホストに対する情報をDNSサーバへ問い合わせを行い、結果を表示する。

書式

$ dig [@DNSサーバ] URL(host・FQDN) [クエリタイプ]

サンプルコマンド

$ dig docokanodareka.jp mx

応答メッセージメモ
HEADER   status:NOERROR → 正常な応答
flags        AUTHORITY:0, ADDITTIONAL:0 → 権威サーバへ問い合わせしない
        ANSWER: 0 → 権威を持たない

AUTHORITY SECTION
権威を持たない場合の回答例)
docokanodareka.jp   86400   IN   NS   docokanons.jp.

権威を持つ場合の回答例)
docokanodareka.jp   86400   IN   MX   docokanoms.jp.

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