Linux扩展分区和文件系统

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了Linux扩展分区和文件系统，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含20498字，纯文字阅读大概需要30分钟。

内容图文

磁盘分区
linux也与windows一样，为了使用全部的磁盘空间，需要先对磁盘分区；如果所有分区的总容量小于磁盘容量，说明磁盘还有未分配空间，这个时候会对磁盘造成浪费。需要增加一个新的分区来将全部空间利用上。

fdisk
此命令是磁盘的管理命令。fdisk -l可查看目前磁盘总容量和各分区情况。
fdisk /dev/sda可查看sda磁盘的相关情况，磁盘命名的规则，第一位代表磁盘类型，例如scsi用s表示，虚拟磁盘用v表示。第三位表示硬盘数，从a开始，一直到z。
fdisk -m下可查看各种相关命令，例如增加分区 m，删除分区 d

文件系统
当将未分配的空间追加到新的分区/dev/sda2后，还需要创建物理卷以及扩展。
pvcreate /dev/sda2
vgscan
vgextend cl /dev/sda3
lvextend -L +100G 加上要扩展的分区名

接着用 dh –f，发现实际容量并没有变化，因为我们的系统还不认识刚刚添加进来的磁盘的文件系统，所以还需要对文件系统进行扩容。
xfs_growfs 加上要扩展的分区名或者 resize2fs – f 加 上要扩展的分区名

再次查询，发现文件系统空间变大了。
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https://github.com/users/frgyy777888/projects/8661
https://github.com/users/frgyy777888/projects/8662
https://github.com/users/frgyy777888/projects/8663
https://github.com/users/frgyy777888/projects/8664
https://github.com/users/frgyy777888/projects/8665
https://github.com/users/frgyy777888/projects/8666
https://github.com/users/frgyy777888/projects/8667
https://github.com/users/frgyy777888/projects/8668
https://github.com/users/frgyy777888/projects/8669
https://github.com/users/frgyy777888/projects/8670
https://github.com/users/frgyy777888/projects/8671

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