lsblk

NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

xvda    :       32G   disk

└─xvda1 :        8G   part /

fdisk -u /dev/xvda

Command (m for help): p

Disk /dev/xvda: 34.4 GB,  bytes,  sectors

Units = sectors of  *  =  bytes

Sector size (logical/physical):  bytes /  bytes

I/O size (minimum/optimal):  bytes /  bytes

Disk label type: dos

Disk identifier: 0x000998ac

    Device Boot      Start         End      Blocks   Id  System

/dev/xvda1   *                      Linux

Command (m for help): d

Selected partition

Partition  is deleted

Command (m for help): n

Partition type:

   p   primary ( primary,  extended,  free)

   e   extended

Select (default p): p

Partition number (-, default ):

First sector (-, default ):

Using default value

Last sector, +sectors or +size{K,M,G} (-, default ):

Using default value

Partition  of type Linux and of size  GiB is set

Command (m for help): p

Disk /dev/xvda: 34.4 GB,  bytes,  sectors

Units = sectors of  *  =  bytes

Sector size (logical/physical):  bytes /  bytes

I/O size (minimum/optimal):  bytes /  bytes

Disk label type: dos

Disk identifier: 0x000998ac

    Device Boot      Start         End      Blocks   Id  System

/dev/xvda1                         Linux

Command (m for help): w

The partition table has been altered!

reboot

lsblk

NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

xvda    :       32G   disk

└─xvda1 :       32G   part /

df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/xvda1      .0G  .3G  .8G  % /

ext格式调整大小

resize2fs /dev/xvda1

xfs格式调整大小

xfs_growfs /dev/xvda1

df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/xvda1       32G  .3G   31G   % /