ping baidu.com2.更新yum源
cd /etc/yum.repos.d/ mkdir repos mv -rf * repos/ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo #根据自己系统版本 yum update yum clean all yum makecache3.软件安装报错
类似于Error: Cannot find a valid baseurl for repo: base 或者 Not found 404
参考这个帖子：https://blog.csdn.net/weixin_42272246/article/details/111316339?spm=1001.2014.3001.5506
