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A.3. ethtool
ethtool 公用程式使系統管理員能夠查閱和編輯網路界面卡設定。此工具有助於觀察特定裝置的數據，比方：由裝置刪除的封包數量。
ethtool 的選項與其使用量皆完整地記錄在 man page 中。
$ man ethtool
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