linux挂载磁盘以及扩容主分区

新买的服务器，如果系统安装操作不当，可能会由于系统主分区过小，后期安装软件过多就会导致软件无法正常运行的问题，如果不做系统格式化，就需要通过购买新的硬盘来进行挂载和扩容主分区以解决问题。本文主要介绍linux系统磁盘分区、挂载以及扩容主分区的具体操作步骤。

linux挂载磁盘以及扩容主分区

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磁盘分区及挂载

查看当前磁盘分区
```
fdisk -l
```
建立新分区
```
fdisk /dev/sdb
```
查看已有分区
```
fdisk -l
```
格式化分区，建立文件系统
```
mkfs.xfs -f /dev/sdb1
```
挂载磁盘
```
mount /dev/sdb1 /home/data/
```
查看是否挂载成功
```
df -TH /home/data/
```

扩容主分区

查看已有分区
```
fdisk -l
```
查看卷分组
```
vgdisplay -v
```
创建物理卷
```
pvcreate /dev/sdb1
```
查看结果
```
pvdisplay
```
扩展卷分组
```
vgextend centos /dev/sdb1
```
查看逻辑卷
```
lvdisplay
```
扩展逻辑卷/dev/centos/root
```
lvextend -L +100G /dev/centos/root
```
扩大文件系统
```
xfs_growfs /dev/centos/root
```