linux centos7 替换yum源

替换默认源

替换源：

默认的源是国外的源，国外的源有可能打开比较慢有可能打不开所以要替换源。

国内很多厂商做了镜像我们现在使用163的源。

http://mirrors.163.com/.help/centos.html

1.首先备份repo

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2.查看到备份的repo

cd /etc/yum.repos.d/
ll

3.安装CentOS 7 下载对应版本的 repo 放入到 /etc/yum.repos.d/CentOS-Base.repo

curl http://mirrors.163.com/.help/CentOS7-Base-163.repo -o CentOS7-Base-163.repo

4.运行下面命令生成缓存

yum clean all
yum makecache

5.测试

yum -y update

修改yum源为阿里

1. 备份本地yum源

 mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak

2.获取阿里yum源配置文件

配置文件地址：https://mirrors.tuna.tsinghua.edu.cn/help/centos/

将以下内容写入 /etc/yum.repos.d/CentOS-Base.repo

配置文件内容如下：

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

3.更新cache

yum clean all
yum makecache

4.测试

yum -y update

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linux centos7 替换yum源

替换默认源

修改yum源为阿里

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