centos 安装yum

yum 误删 ，所以重装，我的系统是centos7.2。

 

以下文章实测有效：

https://www.cnblogs.com/xdjun/p/11770418.html

查看：

rpm -qa | grep yum

卸载：

rpm -e yum-plugin-fastestmirror-1.1.31-52.el7.noarch --nodeps

 

http://mirrors.163.com/centos/7/os/x86_64/Packages/python-devel-2.7.5-86.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-protectbase-1.1.31-52.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-aliases-1.1.31-52.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-52.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-python-4.11.3-40.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-chardet-2.2.1-3.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-kitchen-1.1.1-5.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-setuptools-0.9.8-7.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-2.7.5-86.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-backports-1.0-8.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-ipaddress-1.0.16-2.el7.noarch.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/python-libs-2.7.5-86.el7.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm
http://mirrors.163.com/centos/7/os/x86_64/Packages/lvm2-python-libs-2.02.185-2.el7.x86_64.rpm

 

下载执行：

#rpm -Uvh --replacepkgs lvm2-python-libs*.rpm --nodeps --force

#rpm -Uvh --replacepkgs libxml2-python*.rpm --nodeps --force

#rpm -Uvh --replacepkgs python*.rpm --nodeps --force

#rpm -Uvh --replacepkgs rpm-python*.rpm yum*.rpm --nodeps --force

 

情况2：安装成功后，遇到 

https://blog.youkuaiyun.com/qq_39720249/article/details/84104646

 

yum repolist 为0， cd  /etc/yum.repos.d/ 显示文件夹下为空，没有CentOS-Base.repo文件

情况3： https://blog.youkuaiyun.com/u010454030/article/details/78807281

执行wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 下载文件

执行 yum clean all

yum makecache

 

若你执行yum命令报下面错误：

/usr/lib64/python2.7/site-packages/rpm/__rpm.so : underfined symbol rpmpkgverifySigs

请继续下载下面文件(可能下的有点多)：

http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-sign-4.11.3-40.el7.x86_64.rpm
http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-plugin-systemd-inhibit-4.11.3-40.el7.x86_64.rpm
http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-devel-4.11.3-40.el7.x86_64.rpm
http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-cron-4.11.3-40.el7.noarch.rpm
http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-build-4.11.3-40.el7.x86_64.rpm
http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-apidocs-4.11.3-40.el7.noarch.rpm
http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-4.11.3-40.el7.x86_64.rpm
http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/rpm-libs-4.11.3-40.el7.x86_64.rpm

都是rpm开头的文件。然后执行

        rpm -Uvh rpm-libs-*.rpm --nodeps

　　 rpm -Uvh rpm-*.rpm --nodeps

　　 rpm -Uvh rpm-build-*.rpm --nodeps

　　 rpm -Uvh rpm-python-*.rpm --nodeps

　　 rpm -Uvh rpm-sign-*.rpm --nodeps