一.环境配置

1.centos默认的镜像是国外的，速度卡成狗，换成国内镜像https://www.jianshu.com/p/e4e344961e44

2.我们下载的centos可能不能ssh，连接
https://www.jianshu.com/p/63e4d0436c7c

3.centos安装JDK，Tomcat
https://www.jianshu.com/p/89adb1c90e4b

4.centos文件传输scp
https://www.jianshu.com/p/cb43fde3b3a4