---
category: help
layout: help
mirrorid: centos
---

## CentOS 镜像使用帮助

首先备份 CentOS-Base.repo
```
sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
```

之后启用 TUNA 软件仓库， 将以下内容写入 /etc/yum.repos.d/CentOS-Base.repo

<form class="form-inline">
<div class="form-group">
	<label>选择你的 CentOS 版本: </label>
	<select class="form-control release-select" data-template="#repo-template" data-target="#repo-content">
	  <option data-release="5">CentOS 5</option>
	  <option data-release="6">CentOS 6</option>
	  <option data-release="7" selected>CentOS 7</option>
	</select>
</div>
</form>

{% raw %}
<script id="repo-template" type="x-tmpl-markup">
# 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-{{release_name}}

#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-{{release_name}}

#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=$basearch&repo=extras
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-{{release_name}}
{{if release_name|equals>5}}
#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/addons/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-{{release_name}}
{{/if}}
#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=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-{{release_name}}
{{if release_name|between>5>6}}
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-{{release_name}}{{/if}}
</script>
{% endraw %}

<p></p>

<pre>
<code id="repo-content">
</code>
</pre>

更新软件包缓存
```
sudo yum makecache
```
