解决Centos7使用yum 下载速度慢的问题

更换数据源 阿里yum源

• 1、首先备份系统自带yum源配置文件/etc/yum.repos.d/CentOS-Base.repo

[root@localhost ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

• 2、下载ailiyun的yum源配置文件到/etc/yum.repos.d/

[root@localhost ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

• 3、运行yum makecache生成缓存

[root@localhost ~]# yum makecache