Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path
yum - y install时报以下错误。
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
解决方法：
打开/etc/yum.repo.d/CentOS-Base.repo (前缀也就是CentOS，根据不同的系统，有可能不一样)
把原有的文件备份一个，新创建一个CentOS-Base.repo，复制进去以下内容：
[base]
name=CentOS-5 - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever5&arch=$basearch&
repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
baseurl=http://centos.ustc.edu.cn/centos/5/os/i386/
gpgcheck=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5
#released updates
[update]
name=CentOS-5 - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=updates
baseurl=http://centos.ustc.edu.cn/centos/5/os/i386/
gpgcheck=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5
#packages used/produced in the build but not released
[addons]
name=CentOS-5 - Addons
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=addons
baseurl=http://centos.ustc.edu.cn/centos/5/os/i386/
gpgcheck=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5
#additional packages that may be useful
[extras]
name=CentOS-5 - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=extras
baseurl=http://centos.ustc.edu.cn/centos/5/os/i386/
gpgcheck=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-5 - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=centosplus
baseurl=http://centos.ustc.edu.cn/centos/5/os/i386/
gpgcheck=0
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5
#contrib - packages by Centos Users
