因为命令是python的包，所以，需要先下载一个python，用pip下载次命令。命令如下；

yum -y install python-pip

#等待安装完成后执行：

pip install speedtest-cli

安装完成后输入  speedtest-cli  即可开始检查带宽上下行最大值。（注意运行脚本的时候不要下载或上传，否则检查会低于实际值）

root@idcy:[/root]speedtest-cli   

Retrieving speedtest.net configuration...

Testing from China Unicom (125.119.20.3)...

Retrieving speedtest.net server list...

Selecting best server based on ping...

Hosted by China Telecom TianJin-5G (TianJin) [123.83 km]: 47.213 ms

Testing download speed................................................................................

Download: 18.59 Mbit/s

Testing upload speed................................................................................................

Upload: 19.58 Mbit/s