CentOS-7.5 更换清华大学 yum 源

1、更换 yum 源的原因

国外网站连接响应太慢

国内 yum 源响应速度快

2、国内 yum 源

阿里云 yum 源

清华大学 yum 源

中科大 yum 源

网易 yum 源

3、更换清华大学 yum 源

1）建议先备份 CentOS-Base.repo

sudo  cp  /etc/yum.repos.d/CentOS-Base.repo   /etc/yum.repos.d/CentOS-Base.repo.bak

然后编辑 /etc/yum.repos.d/CentOS-Base.repo 文件，在以 mirrorlist= 开头的行前面加 # 注释掉；

并将以 baseurl= 开头的行取消注释（如果被注释的话），把该行内的域名（例如mirror.centos.org）替换为 mirrors.tuna.tsinghua.edu.cn。

2）实际操作

[root@shell ~]#

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

[root@shell ~]#

[root@shell ~]# vi  /etc/yum.repos.d/CentOS-Base.repo

修改说明：

yum源配置总共有4项，但是更改方式都一样。都是将每一小块以“mirrorlist=”开头的那一行注释掉，然后将每一小块以“baseurl= ”开头的那一行前面的注释取消，最后将每一小块以“baseurl= ”开头的那一行内的centos官方域名（mirror.centos.org）更换为清华大学的域名（mirrors.tuna.tsinghua.edu.cn）即可

清华大学 yum 源配置实例： 

# 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

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra

baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates

[updates]

name=CentOS-$releasever - Updates

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra

baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra

baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/

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

#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra

baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[root@shell ~]# 

[root@shell ~]# yum  clean  all                    #清空yum缓存

[root@shell ~]# yum  makecache                    #更新yum源缓存

[root@shell ~]# yum  repolist 

[root@shell ~]#

[root@shell ~]# yum  list  httpd  mariadb  php