目录
二 、更改/etc/yum.repos.d/CentOS-Base.repo配置文件
2， vi /etc/yum.repos.d/CentOS-Base.repo 复制下面代码
3，下载新的镜像CentOS-Base.repo 到 /etc/yum.repos.d/
yum install -y git 出现错误
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一、ping 通baidu
ping www.baidu.com
二 、更改/etc/yum.repos.d/CentOS-Base.repo配置文件
1，yum clean all
2， vi /etc/yum.repos.d/CentOS-Base.repo 复制下面代码
[base]
name=CentOS-$releasever
enabled=1
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos-vault/centos/RPM-GPG-KEY-CentOS-6
[updates]
name=CentOS-$releasever
enabled=1
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos-vault/centos/RPM-GPG-KEY-CentOS-6
[extras]
name=CentOS-$releasever
enabled=1
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos-vault/centos/RPM-GPG-KEY-CentOS-6
[centosplus]
name=CentOS-6.10 - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos-vault/centos/RPM-GPG-KEY-CentOS-6
[contrib]
name=CentOS-6.10 - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos-vault/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos-vault/centos/RPM-GPG-KEY-CentOS-6
3，下载新的镜像CentOS-Base.repo 到 /etc/yum.repos.d/
1. CentOS6镜像下载
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-6.10.repo
2. Centos7镜像下载
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
3. Centos8镜像下载
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
4，安装git
yum install -y git