# CentOS 7.8更换yum源 由于默认yum源地址是国外，下载不方便，将其更新为国内的 # 备份原有配置 `cd /etc/yum.repos.d && cp CentOS-Base.repo CentOS-Base.repo_backup` # 如何存在epel配置，删除 `rm -rf epel*` # 修改CentOS-Base.repo > 如果内核版本不是7.8，查看当前内核信息，将7.8.2003替换，查看内核命令`cat /etc/redhat-release`  **开始配置** $ vi CentOS-Base.repo ```shell [base] name=CentOS-$releasever - Base baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.8.2003/os/x86_64/ gpgcheck=1 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-$releasever [updates] name=CentOS-$releasever - Updates baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.8.2003/updates/x86_64/ gpgcheck=1 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-$releasever [extras] name=CentOS-$releasever - Extras baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.8.2003/extras/x86_64/ gpgcheck=1 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-$releasever [centosplus] name=CentOS-$releasever - Plus baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.8.2003/centosplus/x86_64/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-$releasever [contrib] name=CentOS-$releasever - Contrib baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.8.2003/contrib/x86_64/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-$releasever ``` # 更新配置 清除信息`yum clean all`，建立元数据缓存`yum makecache`