站长是什么职位_网页设计与制作属于什么专业_百度搜题_seo建站营销

使用yum命令安装东西时报错：

Loaded plugins: fastestmirror, ovl
Repository cr is listed more than once in the configuration
Repository fasttrack is listed more than once in the configuration
Loading mirror speeds from cached hostfileCould not retrieve mirrorlist http://mirrorlist.centos.org?arch=x86_64&release=7&repo=sclo-rh error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

解决方法：

cd /etc/yum.repos.d/

修改该目录下的CentOS-SCLo-scl.repo和CentOS-SCLo-scl-rh.repo文件内容

分别注释掉下面两行

mirrorlist=http://mirrorlist.centos.org?arch=$basearch&release=7&repo=sclo-sclo

mirrorlist=http://mirrorlist.centos.org?arch=$basearch&release=7&repo=sclo-rh

然后修改两个文件中的baseurl这一行，把域名mirror.centos.org修改为vault.centos.org

然后

sudo yum clean all

sudo yum makecache

即可