测试服务器速度
yum install python
wget -O speedtest-cli https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py
chmod +x speedtest-cli
./speedtest-cli
关闭防火墙，根据系统选择
#centos 6 执行
service iptables stop && chkconfig iptables off
#centos 7 执行
sudo systemctl stop firewalld.service && sudo systemctl disable firewalld.service
下载文件
#首先安装lrzsz
yum -y install lrzsz
#下载
sz /usr/local/xxx/mudb.json
