Kingsoft Cloud-Documentation-CentOS yum source configuration

Enter the directory of the yum source configuration file.
```
cd  /etc/yum.repos.d/
ls
```
Back up the yum source configuration file of Kingsoft Cloud.
```
mv CentOS.repo CentOS_repo
```
Copy the system-provided yum source file to the current directory.
```
cp backup/CentOS-Base.repo .          
ls
```
Update the system.
```
yum update
```

Enter the directory of the yum source configuration file.
```
cd  /etc/yum.repos.d/
ls
```
Delete the system-provided yum source configuration file and use the file provided by Kingsoft Cloud.
```
rm -f CentOS-Base.repo
mv CentOS_repo CentOS.repo
```
Update the system.
```
yum update
```

Enter the directory of the yum source configuration file.
```
cd /etc/yum.repos.d/
```
Back up the current yum source configuration file.
```
mv CentOS-Base.repo CentOS-Base_repo_bak
```

Download the new configuration file. The following uses the yum source provided by NetEase as an example.

wget [http://mirrors.163.com/.help/CentOS6-Base-163.repo](http://mirrors.163.com/.help/CentOS6-Base-163.repo)

Rename the configuration file according to the file requirement. The following uses “CentOS6-Base-163.repo” as an example.
```
mv CentOS6-Base-163.repo CentOS-Base.repo
```
Update the system.
```
yum update
```

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