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<a href="https://www.niaoyun.com/docs/16483.html" _src="https://www.niaoyun.com/docs/16483.html">https://www.niaoyun.com/docs/16483.html</a> lsblk查看分区和磁盘df -h查看空间使用情况fdisk -l分区工具查看分区信息cfdisk /dev/sda 查看分区blkid 　&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 查看硬盘label（别名）du -sh ./* 　　&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;统计当前目录各文件夹大小free -h 　&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 查看内存大小cat /proc/cpuinfo| grep &quot;cpu cores&quot;| uniq&nbsp; 　　查看cpu核心数&nbsp;<p style="margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="" margin-top:="" 0px="">当云服务器使用一段时间后可能会有数据盘空间不足的情况，那么升级数据盘大小之后就需要进行系统内部磁盘空间扩容操作，这边以数据盘<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">20G</code>升级为<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">30G</code>为例(针对此操作时需小心谨慎操作，操作失误将会导致数据丢失，建议先备份好数据再进行操作)：<p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:=""><img src="/ueditor/php/upload/image/20181226/1545756172637995.jpg" alt="1.jpg" style="margin: 0px 0px 0px 18.3906px; padding: 0px; box-sizing: border-box; list-style: none; border: 0px; max-width: 97%; box-shadow: rgb(204, 204, 204) 0px 1px 5px;" title="1545756172637995.jpg"/><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:=""><img src="/ueditor/php/upload/image/20181226/1545756188731775.jpg" alt="2.jpg" style="margin: 0px 0px 0px 18.3906px; padding: 0px; box-sizing: border-box; list-style: none; border: 0px; max-width: 97%; box-shadow: rgb(204, 204, 204) 0px 1px 5px;" title="1545756188731775.jpg"/><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="">1、卸载挂载中的数据盘：<pre class="prettyprint linenums prettyprinted" style="margin-top: 0px; margin-bottom: 16px; padding: 2px; box-sizing: border-box; list-style: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 13.6px; line-height: 1.6; font-family: Consolas, " liberation="" overflow-wrap:="" overflow:="" background-color:="" border-radius:="" border:="" 1px="" solid="" color:="">umount&nbsp;/dev/sdb1</pre><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="">2、使用parted工具读取磁盘分区表信息；先使用&nbsp;<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">p</code>&nbsp;查看可扩容磁盘大小，再通过<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">unit s</code>命令定义默认使用sectors展示，获取起始位置信息：<p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:=""><img src="/ueditor/php/upload/image/20181226/1545756208519738.jpg" alt="3.jpg" style="margin: 0px 0px 0px 18.3906px; padding: 0px; box-sizing: border-box; list-style: none; border: 0px; max-width: 97%; box-shadow: rgb(204, 204, 204) 0px 1px 5px;" title="1545756208519738.jpg"/><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="">3、创建新分区。先使用&nbsp;<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">rm + 序列号</code>&nbsp;来删除老的分区表；然后使用&nbsp;<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">mkpart</code>&nbsp;命令来创建即可，这里需要注意的是parted工具里END的值，由于一般大家都不清楚具体的扇区数量，可以使用容量来替代。<ul style="list-style-type: none;" class=" list-paddingleft-2"><li>请注意以下操作步骤需要处于<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">unit s</code>的<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">sectors</code>扇区模式中操作，否则将导致数据盘扩展异常</li></ul><pre class="prettyprint linenums prettyprinted" style="margin-top: 0px; margin-bottom: 16px; padding: 2px; box-sizing: border-box; list-style: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 13.6px; line-height: 1.6; font-family: Consolas, " liberation="" overflow-wrap:="" overflow:="" background-color:="" border-radius:="" border:="" 1px="" solid="" color:="">rm&nbsp;1mkpart&nbsp;primary&nbsp;ext4&nbsp;2048&nbsp;32.2G</pre><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:=""><img src="/ueditor/php/upload/image/20181226/1545756295535898.jpg" alt="4.jpg" style="margin: 0px 0px 0px 18.3906px; padding: 0px; box-sizing: border-box; list-style: none; border: 0px; max-width: 97%; box-shadow: rgb(204, 204, 204) 0px 1px 5px;" title="1545756295535898.jpg"/><h5 id="h5-ps-information-you-may-need-to-update-etc-fstab-df-h-dev-sdb1-" style="margin: 26px 0px 16px; padding: 0px; box-sizing: border-box; list-style: none; position: relative; line-height: 1.4; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="" font-size:="" 1em=""><a style="margin: 0px; padding: 0px; box-sizing: border-box; list-style: none; outline: 0px; background-image: initial; background-position: 0px 0px; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(0, 170, 255) !important;" name="PS：请注意查看执行完扩展指令退出后是否有显示红色线条展示的信息(Information: You may need to update /etc/fstab.)，有的话可执行下 df -h 查看是否/dev/sdb1磁盘已自动挂载上了，那么此时就需要重新卸载数据盘进行后续操作，否则就会提示数据盘已挂载："></a>PS：请注意查看执行完扩展指令退出后是否有显示红色线条展示的信息(Information: You may need to update /etc/fstab.)，有的话可执行下 df -h 查看是否/dev/sdb1磁盘已自动挂载上了，那么此时就需要重新卸载数据盘进行后续操作，否则就会提示数据盘已挂载：</h5><pre class="prettyprint linenums prettyprinted" style="margin-top: 0px; margin-bottom: 16px; padding: 2px; box-sizing: border-box; list-style: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 13.6px; line-height: 1.6; font-family: Consolas, " liberation="" overflow-wrap:="" overflow:="" background-color:="" border-radius:="" border:="" 1px="" solid="" color:="">umount&nbsp;/dev/sdb1</pre><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:=""><img src="/ueditor/php/upload/image/20181226/1545756306701244.jpg" alt="5.jpg" style="margin: 0px 0px 0px 18.3906px; padding: 0px; box-sizing: border-box; list-style: none; border: 0px; max-width: 97%; box-shadow: rgb(204, 204, 204) 0px 1px 5px;" title="1545756306701244.jpg"/><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="">4、检测磁盘是否有错误:<pre class="prettyprint linenums prettyprinted" style="margin-top: 0px; margin-bottom: 16px; padding: 2px; box-sizing: border-box; list-style: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 13.6px; line-height: 1.6; font-family: Consolas, " liberation="" overflow-wrap:="" overflow:="" background-color:="" border-radius:="" border:="" 1px="" solid="" color:="">e2fsck&nbsp;-f&nbsp;/dev/sdb1</pre><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="">5、扩展数据盘大小：（<code style="margin: 0px; padding: 0.2em 0px; box-sizing: border-box; list-style: none; font-family: Consolas, " liberation="" font-size:="" background-color:="" border-radius:="">如文件格式为xfs，则使用命令：xfs_growfs /dev/sdb1</code>）<pre class="prettyprint linenums prettyprinted" style="margin-top: 0px; margin-bottom: 16px; padding: 2px; box-sizing: border-box; list-style: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 13.6px; line-height: 1.6; font-family: Consolas, " liberation="" overflow-wrap:="" overflow:="" background-color:="" border-radius:="" border:="" 1px="" solid="" color:="">resize2fs&nbsp;/dev/sdb1</pre><p style="margin-top: 0px; margin-bottom: 16px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="">6、重新挂载磁盘并检查磁盘大小：<pre class="prettyprint linenums prettyprinted" style="margin-top: 0px; margin-bottom: 16px; padding: 2px; box-sizing: border-box; list-style: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 13.6px; line-height: 1.6; font-family: Consolas, " liberation="" overflow-wrap:="" overflow:="" background-color:="" border-radius:="" border:="" 1px="" solid="" color:="">mount&nbsp;-a</pre><p style="margin-top: 0px; padding: 0px; box-sizing: border-box; list-style: none; color: rgb(51, 51, 51); font-family: " microsoft="" meiryo="" malgun="" segoe="" trebuchet="" helvetica="" droid="" wenquanyi="" micro="" white-space:="" margin-bottom:="" 0px=""><img src="/ueditor/php/upload/image/20181226/1545756350671182.jpg" alt="6.jpg" style="margin: 0px 0px 0px 18.3906px; padding: 0px; box-sizing: border-box; list-style: none; border: 0px; max-width: 97%; box-shadow: rgb(204, 204, 204) 0px 1px 5px;" title="1545756350671182.jpg"/>