后可用在线yum源 —— 筑梦之路)
众所周知，centos 7 在2024年6月30日，生命周期结束，官方不再进行支持维护，而很多环境一时之间无法完全更新替换操作系统，因此对于yum源还是需要的，特别是对于互联网环境来说，在线yum源使用方便很多，而不需要去搭建本地yum源和内网yum源。
这里以阿里云为例，其他国内开源镜像站类似。此处主要以7.9为例。
1. 备份默认的repo文件
cd /etc/yum.repos.d mkdir backup mv *.repo backup2.配置阿里云的yum源
cat > CentOS-aliyun-lhr.repo << 'EOF' [base] name=CentOS-$releasever - Base - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #released updates [updates] name=CentOS-$releasever - Updates - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that may be useful [extras] name=CentOS-$releasever - Extras - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever - Plus - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 #contrib - packages by Centos Users [contrib] name=CentOS-$releasever - Contrib - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/ http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 EOFcat > epel-aliyun.repo <<'EOF' [epel] name=Extra Packages for Enterprise Linux 7 - $basearch baseurl=http://mirrors.aliyun.com/epel/7/$basearch failovermethod=priority enabled=1 gpgcheck=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 [epel-debuginfo] name=Extra Packages for Enterprise Linux 7 - $basearch - Debug baseurl=http://mirrors.aliyun.com/epel/7/$basearch/debug failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 gpgcheck=0 [epel-source] name=Extra Packages for Enterprise Linux 7 - $basearch - Source baseurl=http://mirrors.aliyun.com/epel/7/SRPMS failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 gpgcheck=0 EOF3. 检查验证
yum clean all yum makecache fast yum install vim lrzsz wget curl net-tools4. 其他可用yum源搜集
1）官方yum源
cat > CentOS-Base.repo <<'EOF' [base] name=CentOS-7.9.2009 enabled=1 failovermethod=priority baseurl=https://vault.centos.org/7.9.2009/os/$basearch/ gpgcheck=1 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-7 [updates] name=CentOS-7.9.2009 enabled=1 failovermethod=priority baseurl=https://vault.centos.org/7.9.2009/updates/$basearch/ gpgcheck=1 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS-7.9.2009 enabled=1 failovermethod=priority baseurl=https://vault.centos.org/7.9.2009/extras/$basearch/ gpgcheck=1 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-7 EOF2）官方epel扩展源
cat > epel.repo <<'EOF' [epel] name=Extra Packages for Enterprise Linux 7 - $basearch #baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch failovermethod=priority enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 [epel-debuginfo] name=Extra Packages for Enterprise Linux 7 - $basearch - Debug #baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch/debug metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-7&arch=$basearch failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 gpgcheck=1 [epel-source] name=Extra Packages for Enterprise Linux 7 - $basearch - Source #baseurl=http://download.fedoraproject.org/pub/epel/7/SRPMS metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-source-7&arch=$basearch failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 gpgcheck=1 EOFcat > epel-testing.repo <<'EOF' [epel-testing] name=Extra Packages for Enterprise Linux 7 - Testing - $basearch #baseurl=http://download.fedoraproject.org/pub/epel/testing/7/$basearch metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-epel7&arch=$basearch failovermethod=priority enabled=0 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 [epel-testing-debuginfo] name=Extra Packages for Enterprise Linux 7 - Testing - $basearch - Debug #baseurl=http://download.fedoraproject.org/pub/epel/testing/7/$basearch/debug metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-debug-epel7&arch=$basearch failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 gpgcheck=1 [epel-testing-source] name=Extra Packages for Enterprise Linux 7 - Testing - $basearch - Source #baseurl=http://download.fedoraproject.org/pub/epel/testing/7/SRPMS metalink=https://mirrors.fedoraproject.org/metalink?repo=testing-source-epel7&arch=$basearch failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 gpgcheck=1 EOF3） 清华大学yum源
cat > CentOS-tsinghua.repo <<'EOF' [base] name=CentOS-7.9.2009 enabled=1 failovermethod=priority baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.9.2009/os/$basearch/ gpgcheck=1 gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [updates] name=CentOS-7.9.2009 enabled=1 failovermethod=priority baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.9.2009/updates/$basearch/ gpgcheck=1 gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS-7.9.2009 enabled=1 failovermethod=priority baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.9.2009/extras/$basearch/ gpgcheck=1 gpgkey=https://mirrors.tuna.tsinghua.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [epel] name=Extra Packages for Enterprise Linux 7 - enabled=1 failovermethod=priority baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/7/$basearch/ gpgcheck=0 gpgkey=https://mirrors.tuna.tsinghua.edu.cn/epel/RPM-GPG-KEY-EPEL-7 EOF4）中科大yum源
cat > CentOS-ustc.repo <<'EOF' [base] name=CentOS- - Base baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/os/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 [updates] name=CentOS- - Updates baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/updates/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS- - Extras baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/extras/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 [centosplus] name=CentOS- - Plus baseurl=https://mirrors.ustc.edu.cn/centos-vault/centos/7.9.2009/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 EOF5）网易yum源
cat > CentOS-163.repo <<'EOF' [base] name=CentOS-$releasever - Base - 163.com #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os baseurl=http://mirrors.163.com/centos-vault/7.9.2009/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7 #released updates [updates] name=CentOS-$releasever - Updates - 163.com #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates baseurl=http://mirrors.163.com/centos-vault/7.9.2009/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that may be useful [extras] name=CentOS-$releasever - Extras - 163.com #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras baseurl=http://mirrors.163.com/centos-vault/7.9.2009/extras/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever - Plus - 163.com baseurl=http://mirrors.163.com/centos-vault/7.9.2009/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7 EOF6) 腾讯yum源
cat > CentOS7-tencent-x86-64.repo << 'EOF' [base] name=CentOS-$releasever - base - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/os/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [updates] name=CentOS-$releasever - updates - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/updates/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS-$releasever - extras - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/extras/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [centosplus] name=CentOS-$releasever - centosplus - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/centosplus/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [fasttrack] name=CentOS-$releasever - fasttrack - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/fasttrack/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [atomic] name=CentOS-$releasever - atomic - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/atomic/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [dotnet] name=CentOS-$releasever - dotnet - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/dotnet/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [rt] name=CentOS-$releasever - rt - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/rt/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [sclo-rh] name=CentOS-$releasever - sclo-rh - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/sclo/$basearch/rh/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 [sclo-sclo] name=CentOS-$releasever - sclo-sclo - mirrors.cloud.tencent.com baseurl=https://mirrors.cloud.tencent.com/centos-vault/centos/$releasever/sclo/$basearch/sclo/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.cloud.tencent.com/centos-vault/RPM-GPG-KEY-CentOS-7 EOF7) 荆楚理工学院yum源
cat > CentOS7-jcut-x86-64.repo << 'EOF' [base] name=CentOS-$releasever - base - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/os/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [updates] name=CentOS-$releasever - updates - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/updates/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS-$releasever - extras - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/extras/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [centosplus] name=CentOS-$releasever - centosplus - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/centosplus/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [fasttrack] name=CentOS-$releasever - fasttrack - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/fasttrack/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [atomic] name=CentOS-$releasever - atomic - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/atomic/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [dotnet] name=CentOS-$releasever - dotnet - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/dotnet/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [rt] name=CentOS-$releasever - rt - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/rt/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [sclo-rh] name=CentOS-$releasever - sclo-rh - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/sclo/$basearch/rh/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [sclo-sclo] name=CentOS-$releasever - sclo-sclo - mirrors.jcut.edu.cn baseurl=https://mirrors.jcut.edu.cn/centos-vault/centos/$releasever/sclo/$basearch/sclo/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.jcut.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 EOF8) 南阳理工学院yum源
cat > CentOS7-nyist-x86-64.repo << 'EOF' [base] name=CentOS-$releasever - base - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/os/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [updates] name=CentOS-$releasever - updates - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/updates/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [extras] name=CentOS-$releasever - extras - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/extras/$basearch/ enabled=1 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [centosplus] name=CentOS-$releasever - centosplus - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/centosplus/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [fasttrack] name=CentOS-$releasever - fasttrack - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/fasttrack/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [atomic] name=CentOS-$releasever - atomic - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/atomic/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [dotnet] name=CentOS-$releasever - dotnet - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/dotnet/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [rt] name=CentOS-$releasever - rt - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/rt/$basearch/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [sclo-rh] name=CentOS-$releasever - sclo-rh - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/sclo/$basearch/rh/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 [sclo-sclo] name=CentOS-$releasever - sclo-sclo - mirrors.nyist.edu.cn baseurl=https://mirrors.nyist.edu.cn/centos-vault/centos/$releasever/sclo/$basearch/sclo/ enabled=0 gpgcheck=1 gpgkey=https://mirrors.nyist.edu.cn/centos-vault/RPM-GPG-KEY-CentOS-7 EOF其他centos版本的yum源配置：
CentOS 6 在线可用yum源配置——筑梦之路_centos6可用yum源-CSDN博客
CentOS 8 停止维护后换可用yum源——筑梦之路_centos yum 阿里云镜像还支持吗-CSDN博客
参考资料：
https://www.cnblogs.com/yeziwinone/p/17916626.html
centos镜像_centos下载地址_centos安装教程-阿里巴巴开源镜像站
CentOS Vault 软件仓库镜像使用帮助 - MirrorZ Help
