linux安装yum国内源有感 centos7

1.先安装wget,再进行备份/etc/yum.repos.d

yum install wget -y
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum makecache

2.No package  XXX available.

出现这种问题的原因是要安装的软件包默认不在centos的光盘yum仓库中,因此我们需要配置 epel仓库

//配置epel源

 yum install -y epel-release

 

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