CentOS 老版本（7/6）默认源已经失效,换源的方法

CentOS 老版本（7/6）装不了包，是因为 CentOS 7 已于 2024-06-30 停止维护（EOL），官方源 mirror.centos.org 已下线，默认的 yum 源自然全失效。

方法一：腾讯云（一键，推荐）

mkdir -p /etc/yum.repos.d/backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.cloud.tencent.com/repo/centos7_base.repo
yum clean all && yum makecache

方法二：阿里云（vault 目录手动写源）

mkdir -p /etc/yum.repos.d/backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/
cat > /etc/yum.repos.d/CentOS-Base.repo <<'EOF'
[base]
name=CentOS-7 - Base
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/RPM-GPG-KEY-CentOS-7

[updates]
name=CentOS-7 - Updates
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/RPM-GPG-KEY-CentOS-7

[extras]
name=CentOS-7 - Extras
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/RPM-GPG-KEY-CentOS-7
EOF
yum clean all && yum makecache

方法三：清华源（实测 ）

mkdir -p /etc/yum.repos.d/backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/
cat > /etc/yum.repos.d/CentOS-Base.repo <<'EOF'
[base]
name=CentOS-7 - Base
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/7.9.2009/os/RPM-GPG-KEY-CentOS-7

[updates]
name=CentOS-7 - Updates
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/7.9.2009/os/RPM-GPG-KEY-CentOS-7

[extras]
name=CentOS-7 - Extras
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/7.9.2009/os/RPM-GPG-KEY-CentOS-7
EOF
yum clean all && yum makecache

方法四：长期方案 —— 迁移系统（CentOS 7 已停止维护，治本）

# 迁移到 Rocky Linux 9（免费，兼容 CentOS 7 的 rpm 生态）
curl -o /tmp/migrate2rocky.sh https://raw.githubusercontent.com/rocky-linux/rocky-tools/main/migrate2rocky/migrate2rocky.sh

bash /tmp/migrate2rocky.sh -r 9.9

⚠️ 迁移前务必先做快照 / 备份，迁移有失败风险，适合时间充裕的时候操作。

源启计算・专注全球云主机 / VPS / 物理服务器 / 站群服务器 / 住宅 IP / 显卡服务器 / 高防服务器，专业技术支持，随时为您服务。