查看 yum版本
rpm -qa |grep yum
删除yum包
rpm -qa|grep yum|xargs rpm -e --nodeps
下载yum 包
wget /centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpmwget /centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpmwget /centos/7/os/x86_64/Packages/yum-utils-1.1.31-54.el7_8.noarch.rpmwget /centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpmwget /centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
安装yum包
rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm --force --nodepsrpm -ivh yum-* --force --nodepsrpm -qa |grep yum
