CentOS中设置yum源的详细步骤

# 备份原有repo文件
sudo cp -r /etc/yum.repos.d /etc/yum.repos.d.backup

# 删除原有repo文件
sudo rm -rf /etc/yum.repos.d/*.repo

# 下载阿里云Base源
sudo curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

# 下载EPEL源
sudo yum install -y epel-release
sudo curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

# 下载阿里云Base源
sudo curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo

# 下载EPEL源
sudo dnf install -y epel-release
sudo curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-8.repo

# 清理缓存
sudo yum clean all

# 生成新缓存
sudo yum makecache

# 更新系统
sudo yum update -y

[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.aliyun.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

# 查看已配置的yum源
yum repolist all

# 测试安装软件包
yum search nginx

# 导入GPG key
sudo rpm --import https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

# 完全清理
sudo yum clean all
sudo rm -rf /var/cache/yum
sudo yum makecache