Centos 7 配置阿里云的yum源

Centos 7 配置阿里云的yum源

yum是centos下更新、管理软件的命令，也有相应的图像界面版本；

yum源是yum命令去哪里取安装包的地图；

yum命令查询repo上配置的地址去取相应的rpm包进行安装；

[root@localhost ~]# uname -r	3.10.0-693.el7.x86_64[root@localhost ~]# cat /etc/redhat-release	CentOS Linux release 7.4.1708 (Core)

[root@localhost ~]# uname -r 3.10.0-693.el7.x86_64[root@localhost ~]# cat /etc/redhat-release CentOS Linux release 7.4.1708 (Core)

1、备份系统原来的yum源

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

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

2、下载阿里云的CentOS-Base.repo 到/etc/yum.repos.d/

3、添加阿里云公共DNS

为了防止不能寻找yun源地址，生成cache，先添加阿里云的DNS

[root@localhost ~]# vim /etc/resolv.conf	添加		nameserver 223.5.5.5		nameserver 223.6.6.6

[root@localhost ~]# vim /etc/resolv.conf 添加 nameserver 223.5.5.5 nameserver 223.6.6.6

4、清理缓存，并生成新缓存

[root@localhost ~]# yum clean all && yum makecache

[root@localhost ~]# yum clean all && yum makecache