查看Centos 版本

1、lsb_release -a

2、cat /etc/redhat-release

        CentOS Linux release 7.4.1708 (Core)

3、rpm -q centos-release

           centos-release-7-4.1708.el7.centos.x86_64

4、cat /etc/issue

一种不行就换另一种，总有一款适合你！