CentOS中将DVD作为默认yum源的设置方法
<p><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>其实对于CentOS DVD来说，里面提供的软件就足以满足我们的需要了，而且DVD里的软件版本都是稳定版，下载速度还快，对于学习CentOS来说，将CentOS DVD作为默认yum源可以大大提高学习效率。</span></p>
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1、为DVD创建一个挂载目录</p>
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<span># mkdir /media/CentOS</span></p>
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2、在Linux下挂载CentOS DVD(虚拟机挂载DVD不说了，应该都会)</p>
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<span># mount -t auto /dev/cdrom /media/CentOS</span></p>
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3、查看相关配置文件，目录为</p>
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# ls -l /etc/yum.repos.d/<br>
-rw-r--r--. 1 root root 1926 7月 3 10:15 CentOS-Base.repo<br>
-rw-r--r--. 1 root root 637 7月 3 10:15 CentOS-Debuginfo.repo<br>
-rw-r--r--. 1 root root 626 7月 3 10:15 CentOS-Media.repo</p>
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4、禁用yum的网络更新方式，简单地将默认首选的CentOS-Base.repo改名为CentOS-Base.repo.bak即可</p>
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<span># mv CentOS-Base.repo CentOS-Base.repo.bak</span></p>
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5、配置本地yum源</p>
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<span># vim /etc/yum.repos.d/CentOS-Media.repo</span></p>
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将</p>
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<br>
name=CentOS-$releasever - Media<br>
baseurl=file:///media/CentOS/<br>
file:///media/cdrom/<br>
file:///media/cdrecorder/<br>
gpgcheck=1<br>
enabled=0</p>
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修改为</p>
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<br>
name=CentOS-$releasever - Media<br>
baseurl=<span>file:///media/CentOS/</span><br>
gpgcheck=1<br><span>enabled=1</span></p>
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其中baseurl修改为DVD的挂载目录，enabled=1开启本地更新模式</p>
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:wq 保存退出</p>
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6、清除原有的yum信息</p>
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<span># yum clean all</span><br>
Loaded plugins: fastestmirror<br>
Cleaning up Everything</p>
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7、检查DVD软件列表</p>
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<span># yum list</span><br>
Loaded plugins: fastestmirror<br>
Determining fastest mirrors<br>
c6-media | 3.7 kB 00:00 ...<br>
c6-media/primary_db | 3.3 MB 00:00 ...</p>
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这样以后就默认使用DVD安装软件了，如果想恢复网络安装模式，将 CentOS-Base.repo.bak 更名还原即可。</p>
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PS.每次重启系统后需要手工挂载DVD到/media/CentOS/，如果嫌麻烦可以自己写脚本自动挂载。</p>
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