# 以 ethtool 查看網路卡狀態及設定 執行 ethtool 需要有 root 權限（以 root 或 sudo 執行） 顯示、設定 Ring buffer ```bash ethtool -g ethX ethtool -G ethX ``` \ 顯示網路卡統計資訊 ```bash ethtool -S ethX ``` \ 顯示 offload 功能 ```bash ethtool -K ethX ``` 透過限制 advertise，可以限制 autoneg 後的網卡傳輸速度，可使用 ethtool eth0 查看網卡目前模式的速度。 ```bash ethtool -s eth0 advertise 0x008 ``` \ advertise 數值的意義:\ 0x001 10 Half\ 0x002 10 Full\ 0x004 100 Half\ 0x008 100 Full\ 0x010 1000 Half\ 0x020 1000 Full\ 0x8000 100000 Full\ 0x03F Auto\\ \ 更多資料請參考 ethtool 使用手冊 (man ethtool) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://applezu.netdpi.net/02-linux-xi-tong-cao-zuo/ethtool.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.