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    ###### tags: `iperf` `查網路速度` # iperf ### 狀況 88.254(備份機),WinSCP到88.239(還原機),速度很慢(每秒10MB),想確認網速是否正常? ![](https://i.imgur.com/AxCSrh3.png) - 安裝Iperf [載點](https://iperf.fr/iperf-download.php) - Windows(Client) : 88.254(備份機) 從 Download iPerf for Windows 下載執行檔安裝,最後得到以下檔案 ![](https://i.imgur.com/CypK7fc.png) - Ubuntu(Server) : 88.108(還原機) ※88.239裡面的Guest OS 從 Download iPerf for Ubuntu / Debian / Mint下載 會先得到 iperf3_3.9-1_amd64.deb 檔案 可用7-zip解壓,傳到239執行,出現錯誤訊息 ![](https://i.imgur.com/SZy661y.png) 查詢錯誤訊息得知,有些較舊的作業系統可能需要另外下載函式庫 找到以下網址 > [iperf3安装配置使用踩坑记录 - TinyChen's Studio - 互联网技术学习工作经验分享](https://tinychen.com/20190409-iperf3/) 參考其作法 ==wget -O /usr/lib/libiperf.so.0 https://iperf.fr/download/ubuntu/libiperf.so.0_3.1.3== ![](https://i.imgur.com/S1o9Lpx.png) 依照建議加上參數才能下載函式庫 --no-check-certificate ==wget -O /usr/lib/libiperf.so.0 https://iperf.fr/download/ubuntu/libiperf.so.0_3.1.3 --no-check-certificate== ![](https://i.imgur.com/0N0pVz1.png) 下載iperf檔案 ==wget -O /usr/bin/iperf3 https://iperf.fr/download/ubuntu/iperf3_3.1.3 --no-check-certificate== ![](https://i.imgur.com/ZTjVLKg.png) 下指令測試安裝成功 ==iperf3 -help== ![](https://i.imgur.com/O5jxfyv.png) - 測速 - Ubuntu(Server) : 88.239(還原機) ==iperf -s== ![](https://i.imgur.com/nalV1Bo.png) - Windows(Client) : 88.108(備份機) ==iperf3.exe -c 192.168.88.108== ![](https://i.imgur.com/cJSiiYL.png) - 由紅框得知網速頻寬1G正常。 - 結論 - 網速正常 - WinSCP透過加密/壓縮傳檔,會讓速度變慢許多 ※加密/壓縮動作快慢會受CPU等級影響 - 再找看看,有沒有透過SSH方式傳輸檔案變快的方法,或是用其它方式更快的傳輸 ``` 後續: 日後傳大檔案先用SCP指令傳輸 可達(100MB/S)正常速度 過程: 用iperf測速 備份機傳檔至還原機 正常(100MB/S) ※排除硬體問題 桌機安裝最新WinSCP傳 速度正常(100MB/S) ※排除軟體問題 備份機裝最新WinSCP傳 速度緩慢(10MB/S) 比對過兩邊設定檔參數皆一致,但傳輸速度差很大 另裝軟體用scp指令方式傳輸 速度正常(100MB/S) 由於先前備份機有裝過WinSCP,懷疑移除安裝無法清除登錄檔造成差異 ```

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