centos系统磁盘扩容
<p><span style="font-size: 16px"><span style="font-family: 宋体">1.查看磁盘空间大小，使用</span><span style="color: rgba(255, 0, 0, 1)">df -h</span> <span style="font-family: 宋体">命令</span><span style="font-family: 宋体"><span style="font-family: 宋体">。</span></span></span></p><p><span style="font-family: 宋体; font-size: 16px"><span style="font-family: 宋体"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092253855-244486684.png" alt=""></span></span></p>
<p class="p"><span style="font-size: 16px">2. <span style="font-family: 宋体">增加磁盘空间，例如下图使用</span>VM虚拟机增加的方式。<span style="font-family: 宋体">物理机直接安装挂载上去。</span></span></p>
<p class="p"><span style="font-family: 宋体; font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092314009-1244211518.png" alt=""></span></p>
<p class="p"><span style="font-size: 16px">3. <span style="font-family: 宋体">使用</span><span style="color: rgba(255, 0, 0, 1)">fdisk /dev/sda</span>, 创建新分区。</span></p>
<p class="p"><span style="font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092430331-1759856701.png" alt=""></span></p>
<p><span style="font-size: 16px"><span style="font-family: 宋体">4.重启</span>Linux操作系统，使用<span style="color: rgba(255, 0, 0, 1)">reboot</span><span style="font-family: 宋体">命令。</span></span></p>
<p><span style="font-family: 宋体; font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092510826-149051908.png" alt=""></span></p>
<p><span style="font-size: 16px"><span style="font-family: 宋体">5.创建物理卷</span> 使用<span style="color: rgba(255, 0, 0, 1)">pvcreate /dev/sda3</span>命令。</span></p>
<p><span style="font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092533311-973776797.png" alt=""></span></p>
<p><span style="font-size: 16px"><span style="font-family: 宋体">6.查看物理卷信息</span><span style="font-family: 宋体">使用</span><span style="color: rgba(255, 0, 0, 1)">pvdisplay</span>命令。</span></p>
<p><span style="font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092557883-146911139.png" alt=""></span></p>
<p><span style="font-size: 16px">7.<span style="font-family: 宋体">将新增加的分区</span>/dev/sda3<span style="font-family: 宋体">加入到根目录分区</span>centos<span style="font-family: 宋体">中</span>:</span><span style="font-size: 16px"><span style="font-family: 宋体">使用</span><span style="color: rgba(255, 0, 0, 1)">vgextend centos /dev/sda3</span><span style="font-family: 宋体">命令。</span></span></p>
<p><span style="font-family: 宋体; font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092634145-1046696515.png" alt=""></span></p>
<p><span style="font-size: 16px"><span style="font-family: 宋体">8.查看卷组信息，使用</span><span style="color: rgba(255, 0, 0, 1)">vgdisplay</span><span style="font-family: 宋体">命令。</span></span></p>
<p><span style="font-family: 宋体; font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092703494-2132133960.png" alt=""></span></p>
<p><span style="font-size: 16px"><span style="font-family: 宋体">9.增加</span>centos<span style="font-family: 宋体">大小，增加</span>100G。</span><span style="font-size: 16px"><span style="font-family: 宋体">使用</span><span style="color: rgba(255, 0, 0, 1)">lvresize -L +100G /dev/mapper/centos-root</span><span style="font-family: 宋体">命令。</span></span></p>
<p><span style="font-family: 宋体; font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092739835-1961898306.png" alt=""></span></p>
<p><span style="font-size: 16px"><span style="font-family: 宋体">10.重新识别</span>centos<span style="font-family: 宋体">大小，使用</span><span style="color: rgba(255, 0, 0, 1)">xfs_growfs /dev/mapper/centos-root</span><span style="font-family: 宋体">命令。</span></span></p>
<p><span style="font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092803367-2049210301.png" alt=""></span></p>
<p><span style="font-size: 16px">11.<span style="font-family: 宋体">查看扩容后的大小</span> <span style="font-family: 宋体">，使用</span><span style="color: rgba(255, 0, 0, 1)">df -h</span><span style="font-family: 宋体">命令。</span></span></p>
<p><span style="font-family: 宋体; font-size: 16px"><img src="https://img2018.cnblogs.com/blog/1331300/201906/1331300-20190627092823792-549440142.png" alt=""></span></p>
<p> </p><br><br>
来源：https://www.cnblogs.com/renshengruxi/p/11095167.html
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