CentOS8 yum 报错 404 for http://mirrors.cloud.aliyuncs.com/centos/8/AppStream

404 for http://mirrors.cloud.aliyuncs.com/centos/8/AppStream/x86_64/os/repod

问题描述

阿里云服务器，CentOS8，yum安装报错

解决办法

1. 登录CentOS 8系统的ECS实例。具体操作。

2. 运行以下命令备份之前的repo文件。rename '.repo' '.repo.bak' /etc/yum.repos.d/*.repo

    3.运行以下命令下载最新的repo文件。  

wget https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo -O /etc/yum.repos.d/Centos-vault-8.5.2111.repo
wget https://mirrors.aliyun.com/repo/epel-archive-8.repo -O /etc/yum.repos.d/epel-archive-8.repo

4.运行以下命令替换repo文件中的链接。

sed -i 's/mirrors.cloud.aliyuncs.com/url_tmp/g'  /etc/yum.repos.d/Centos-vault-8.5.2111.repo &&  sed -i 's/mirrors.aliyun.com/mirrors.cloud.aliyuncs.com/g' /etc/yum.repos.d/Centos-vault-8.5.2111.repo && sed -i 's/url_tmp/mirrors.aliyun.com/g' /etc/yum.repos.d/Centos-vault-8.5.2111.repo
sed -i 's/mirrors.aliyun.com/mirrors.cloud.aliyuncs.com/g' /etc/yum.repos.d/epel-archive-8.repo

5.运行以下命令重新创建缓存

yum clean all && yum makecache