linux服务器如何测试网速使用步骤：
安装speedtest-cli
speedtest-cli是一个用Python编写的轻量级Linux命令行工具，在Python2.4至3.4版本下均可运行。它基于Speedtest.net的基础架构来测量网络的上/下行速率。安装speedtest-cli很简单——只需要下载其Python脚本文件。
$ wget https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py
$ chmod a+rx speedtest.py # (这步骤是给这个文件权限)
$ mv speedtest.py /usr/local/bin/speedtest
$ chown root:root /usr/local/bin/speedtest # (然后写入root调用命令 )
[root@kht118 kht]# speedtest
Retrieving speedtest.net configuration...
Testing from China Unicom (60.12.8.241)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by China Telecom Wuhan Branch (Wuhan) [564.31 km]: 46.601 ms
Testing download speed................................................................................
Download: 7.66 Mbit/s
Testing upload speed................................................................................................
Upload: 14.33 Mbit/s#也可以执行下面的命令，分享测试结果并生成结果图片的连接[root@kht118 kht]# speedtest --share
Retrieving speedtest.net configuration...
Testing from China Unicom (60.12.8.241)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by China Telecom Wuhan Branch (Wuhan) [564.31 km]: 41.679 ms
Testing download speed................................................................................
Download: 10.70 Mbit/s
Testing upload speed................................................................................................
Upload: 13.33 Mbit/s
