linux查看硬盘分区大小

df -h

Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1        20G   10G   10G  50% /
tmpfs           3.9G     0  3.9G   0% /dev/shm
/dev/sdb1       100G   20G   80G  20% /data

sudo fdisk -l

Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0009f30a

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   41940991   20969472   83  Linux
/dev/sda2       41940992   41943039       1024    82  Linux swap / Solaris

Disk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048  209715199  104856576   83  Linux

lsblk

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0  21.5G  0 disk 
├─sda1   8:1    0   20G  0 part /
└─sda2   8:2    0     1K  0 part 
sdb      8:16   0 107.4G  0 disk 
└─sdb1   8:17   0 100G  0 part /data

sudo cfdisk /dev/sda