1、安装Centos后默认的Yum源如下

ll /etc/yum.repos.d/

 

[root@localhost ~]# ll /etc/yum.repos.d/

total 32

-rw-r--r--. 1 root root 1664 Nov 23 21:16 CentOS-Base.repo

-rw-r--r--. 1 root root 1309 Nov 23 21:16 CentOS-CR.repo

-rw-r--r--. 1 root root 649 Nov 23 21:16 CentOS-Debuginfo.repo

-rw-r--r--. 1 root root 314 Nov 23 21:16 CentOS-fasttrack.repo

-rw-r--r--. 1 root root 630 Nov 23 21:16 CentOS-Media.repo

-rw-r--r--. 1 root root 1331 Nov 23 21:16 CentOS-Sources.repo

-rw-r--r--. 1 root root 5701 Nov 23 21:16 CentOS-Vault.repo

 

 

2、把默认Yum源备份(可选)

 

[root@localhost ~]# mkdir /opt/centos-yum.bak

[root@localhost ~]# mv /etc/yum.repos.d/* /opt/centos-yum.bak/

 

 

 

3、下载163 Yum源repo文件

 

163源：(http://mirrors.163.com/.help/centos.html)--官方地址

#各系统版本repo文件对应的下载操作

 

CentOS 6

wget -O /etc/yum.repos.d/CentOS6-Base-163.repo http://mirrors.163.com/.help/CentOS6-Base-163.repo

CentOS 7

wget -O /etc/yum.repos.d/CentOS7-Base-163.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo

 

阿里云的源：（）--官方地址

 

CentOS 6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

 

或者

 

curl -o /etc/yum.repos.d/CentOS-Base.repo

 

CentOS 7

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

 

或者

 

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

 

查看系统对应版本

[root@localhost ~]# cat /etc/redhat-release

CentOS Linux release 7.6.1810 (Core)

 

下载对应的源文件：

[root@localhost ~]# wget -O /etc/yum.repos.d/CentOS7-Base-163.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo

--2019-05-18 18:40:02-- http://mirrors.163.com/.help/CentOS7-Base-163.repo

Resolving mirrors.163.com (mirrors.163.com)... 59.111.0.251

Connecting to mirrors.163.com (mirrors.163.com)|59.111.0.251|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 1572 (1.5K) [application/octet-stream]

Saving to: ‘/etc/yum.repos.d/CentOS7-Base-163.repo’

 

100%[==============================================================================================================================>] 1,572 --.-K/s in 0s

 

2019-05-18 18:40:02 (186 MB/s) - ‘/etc/yum.repos.d/CentOS7-Base-163.repo’ saved [1572/1572]

 

 

 

清除缓存

# yum clean all

# yum makecache 　　　　把Yum源缓存到本地，加快软件的搜索好安装速度

# yum list 　　　　　　　　列出了yum包

# yum repolist