CentOS7 运行.sh脚本文件提示mirrors访问失败(Errno12)

    今天安装LTMP安装脚本，提示 

timeout on http://mirrors.aliyuncs.com/centos/7/addons/x86_64/repodata/repomd.xml:[12]Timeout on http://http://mirrors.aliyuncs.com/centos/7/addons/x86_64/repodata/repomd.xml(28,'Connection timed out after 30001 milliseconds')



   用浏览器打开http://mirrors.aliyuncs.com/centos/7/addons/x86_64/repodata/repomd.xml，显示404；但访问http://mirrors.aliyuncs.com/倒是正常！

   

   再往下级访问，终于发现问题所在：http://mirrors.aliyuncs.com/centos/7/OS/x86_64/repodata/repomd.xml

   

   解决方法：2选1
   

1、修改Centos-Base.repo 

[root~]#vi /etc/yum.repos.d/CentOS-Base.repo

          baseurl=http://mirrors.aliyun.com/centos/$releasever/addons/$basearch/

                        http://mirrors.aliyuncs.com/centos/$releasever/addons/$basearch/
      更改为:

      

         baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/

                      http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
  

2、替换Centos-Base.repo

[root~]#cd/etc/yum.repos.d

[root~]#mv ./CentOS-Base.repo ./CentOS-Base.repo.bak

[root~]#wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
[root~]#mv CentOS6-Base-163.repo CentOS-Base.repo
[root~]#yum makecache

CentOS 源状态查询地址
http://mirror-status.centos.org/#cn