# 修改linux下yum镜像源为国内镜像

## 修改为阿里yum源-mirrors.aliyun.com

1、首先备份系统自带yum源配置文件/etc/yum.repos.d/CentOS-Base.repo

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

2、查看CentOS系统版本

```
lsb_release -a
```

3、下载ailiyun的yum源配置文件到/etc/yum.repos.d/\
**CentOS7**

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

**CentOS6**

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

**CentOS5**

```
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo
```

\
4、运行yum makecache生成缓存 

```
yum makecache
```

5、这时候再更新系统就会看到以下mirrors.aliyun.com信息

```
yum -y update
```

\
已加载插件：fastestmirror, refresh-packagekit, security\
设置更新进程Loading mirror speeds from cached hostfile\
\* base: mirrors.aliyun.com\
\* extras: mirrors.aliyun.com\
\* updates: mirrors.aliyun.com

## 修改为163yum源-mirrors.163.com

1、首先备份系统自带yum源配置文件/etc/yum.repos.d/CentOS-Base.repo

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

2、进入yum源配置文件所在的文件夹

```
cd /etc/yum.repos.d/
```

3、查看CentOS系统版本

```
lsb_release -a
```

4、下载163的yum源配置文件到上面那个文件夹内

**CentOS7**

```
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
```

**CentOS6**

```
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
```

**CentOS5**

```
wget http://mirrors.163.com/.help/CentOS5-Base-163.repo
```

5、运行yum makecache生成缓存

```
yum makecache
```

6、这时候再更新系统就会看到以下mirrors.163.com信息

\[root\@localhost yum.repos.d]# yum -y update\
已加载插件：fastestmirror, refresh-packagekit, security\
设置更新进程Loading mirror speeds from cached hostfile\
\* base: mirrors.163.com\
\* extras: mirrors.163.com\
\* updates: mirrors.163.com