1.清除原有RHEL的YUM及相關軟件包。
rpm -qa | grep yum | xargs rpm -e --nodeps
查看系統版本
cat /etc/redhat-release
arch
2.下載centos7的相關軟件包
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-167.el7.centos.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-53.el7.noarch.rpm
版本目錄:https://mirrors.edge.kernel.org/centos/7/os/x86_64/Packages/
3. 安裝yum
rpm -ivh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
rpm -ivh yum-3.4.3-167.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-53.el7.noarch.rpm python-urlgrabber-3.10-10.el7.noarch.rpm --nodeps --force
三、安裝完成後,更新yum源
打開網址http://mirrors.163.com/.help/centos.html 在裏面找到對應版本下載repo文件,把它放在/etc/yum.repos.d/下面,然後打開文件將裏面$releasever全部修改爲版本號7。保存
需要文件 ,下面評論郵箱
四、清理緩存,重新建立緩存
yum clean all ------清除緩存
yum makecache -------重新緩存