CentOS-配置YUM源加速(阿里云、Nexus3)

备份本地源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

配置CentOS6
$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
$ sed -i 's/$releasever/6/g' /etc/yum.repos.d/CentOS-Base.repo

配置CentOS7
$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
$ sed -i 's/$releasever/7/g' /etc/yum.repos.d/CentOS-Base.repo

配置Nexus3私服YUM源(可选，适用于中小企业)

注：没有搭建nexus3私服，请直接忽略此步骤

$ vim CentOS-Base.repo

仅替换[base]即可

[base]
name=Nexus
baseurl=http://192.168.1.100:8081/repository/yum-public/$releasever/os/$basearch/
enabled=1
gpgcheck=0

清理
$ yum clean all

$ yum list all

可能遇到的问题

安装网络yum源时遇到异常

$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

http://mirrors.aliyun.com/repo/Centos-7.repo
Resolving mirrors.aliyun.com (mirrors.aliyun.com)... failed: Temporary failure in name resolution.
wget: unable to resolve host address ?.irrors.aliyun.com?

解决办法：

$ vim /etc/resolv.conf