删除原来的yumrpm-qa|grepyumrpm-qa|grepyum|xargsrpm-e--nodeps查看系统版本cat/etc/redhat-releaseuname-m下载安装文件（如果404可以去http://mirrors.163.com/centos...wgethttp://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-81.el6.centos.noarch.rpmwgethttp:///mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpmwgethttp://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpmwgethttp://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm开始安装rpm-ivhpython-iniparse-0.3.1-2.1.el6.noarch.rpmwgethttp://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpmrpm-ivhpython-urlgrabber-3.9.1-11.el6.noarch.rpm由于缺少python-urlgrabber组件导致安装失败，先卸载原来的python，安装新的pythonrpm-qapythonrpm-epython-2.6.6-52.el6.x86_64--nodepswgetftp://mirror.switch.ch/pool/4/mirror/scientificlinux/6.5/x86_64/updates/security/python-2.6.6-64.el6.x86_64。rpmwgethttp://mirrors.163.com/centos/6/os/x86_64/Packages/python-libs-2.6.6-66.el6_8.x86_64.rpmrpm-ivhpython-libs-2.6.6-66.el6_8.x86_64.rpmpython-2.6.6-64.el6.x86_64.rpm--nodeps--force（这两个组件需要一起安装否则会报错）继续安装rpm-ivhpython-urlgrabber-3.9。1-11.el6.noarch.rpm--nodeps--forcerpm-ivhyum-metadata-parser-1.1.2-16.el6.x86_64.rpmrpm-ivhyum-3.2.29-81.el6.centos.noarch.rpmyum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm#查询当前subscription-manager并卸载rpm-qa|grepsubsc*rpm-esubscription-manager-1.12.14-7.el6.x86_64设置yum下载repo文件到/etc/yum.repos.d/cd/etc/yum.repos.d/wgethttp://mirrors.163.com/.help/CentOS7-Base-163.repo将下载文件中的所有$releasever替换为版本号6yumcleanallyummakecacheyumupdate
