CentOS 7 安装yum

刚才百度的时候随便粘贴了一下命令，把yum删掉了，快烦死，搞了一个钟头

如何安装yum

下载rpm包

wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-NetworkManager-dispatcher-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-cron-3.4.3-168.el7.centos.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-langpacks-0.4.2-7.el7.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-aliases-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-auto-update-debug-info-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-changelog-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-copr-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-filter-data-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-fs-snapshot-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-keys-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-list-data-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-local-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-merge-conf-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-ovl-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-post-transaction-actions-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-pre-transaction-actions-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-priorities-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-protectbase-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-ps-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-remove-with-leaves-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-rpm-warm-cache-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-show-leaves-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-tmprepo-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-tsflags-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-upgrade-helper-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-verify-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-plugin-versionlock-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-rhn-plugin-2.0.1-10.el7.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-updateonboot-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-54.el7_8.noarch.rpm
wget https://mirrors.cloud.tencent.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm

安装rpm包，注意安装顺序

rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
rpm -ivh yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm yum-3.4.3-168.el7.centos.noarch.rpm