Centos7系统安装yum遇到的问题

yum list异常

rpm -qa | grep yum
yum-plugin-fastestmirror-1.1.31-50.el7.noarch
yum-utils-1.1.31-52.el7.noarch
yum-3.4.3-161.el7.centos.noarch
yum-metadata-parser-1.1.4-10.el7.x86_64

rpm -e 全部卸载  

mv yum.repos.d yum.repos.d.bak原档案备份

从其他Centos7上复制一份过来  scp ....  .....

下载 rpm包 并安装 rpm -ivh

wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-3.4.3-132.el7.centos.0.1.noarch.rpm

yum list  OK