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<p><span style="font-family:verdana, sans-serif;"><span style="font-size:21px;">https://www.cnblogs.com/luo3911/p/15957833.html</span></span></p>
<h2 style="margin:10px 0px;font-size:21px;line-height:1.5;font-family:verdana, sans-serif;background-color:#ffffff;">操作步骤</h2>
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<p style="margin:10px auto;"><code style="font-family:'Courier New', sans-serif;font-size:12px;padding:0px 5px;line-height:1.8;margin:0px 3px;vertical-align:middle;background-color:#f6f6f6;color:#e83e8c;">cd /etc/yum.repos.d</code> 跳转目录</p>
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<p style="margin:10px auto;"><code style="font-family:'Courier New', sans-serif;font-size:12px;padding:0px 5px;line-height:1.8;margin:0px 3px;vertical-align:middle;background-color:#f6f6f6;color:#e83e8c;">mv ./CentOS-Stream-BaseOS.repo ./CentOS-Stream-BaseOS.repo.backup</code> 备份文件，</p>
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<p style="margin:10px auto;"><code style="font-family:'Courier New', sans-serif;font-size:12px;padding:0px 5px;line-height:1.8;margin:0px 3px;vertical-align:middle;background-color:#f6f6f6;color:#e83e8c;">vi CentOS-Stream-BaseOS.repo</code> 创建文件， 输入以下内容：</p>
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<pre class="language-css"><code># 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-$releasever - Base - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&amp;arch=$basearch&amp;repo=os
baseurl=http://mirrors.163.com/centos/8-stream/BaseOS/x86_64/os/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&amp;arch=$basearch&amp;repo=updates
baseurl=http://mirrors.163.com/centos/8-stream/BaseOS/x86_64/os/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&amp;arch=$basearch&amp;repo=extras
baseurl=http://mirrors.163.com/centos/8-stream/extras/x86_64/os/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - 163.com
baseurl=http://mirrors.163.com/centos/8-stream/centosplus/x86_64/os/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7</code></pre>
<ul style="margin-left:30px;padding-left:0px;font-family:verdana, sans-serif;font-size:13px;background-color:#ffffff;">
<li style="list-style-type:disc;"><code style="font-family:'Courier New', sans-serif;font-size:12px;padding:0px 5px;line-height:1.8;margin:0px 3px;vertical-align:middle;background-color:#f6f6f6;color:#e83e8c;">yum clean all &amp;&amp; yum makecache</code> 更新yum</li>
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