在Linux,如何查看磁盘的分区表？

fdisk命令可用于查看指定设备的分区表列表。

$ sudo fdisk -l

输出示例

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: 0x00009758

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    41943039    19921920   8e  Linux LVM

Disk /dev/mapper/centos-root: 18.2 GB, 18249416704 bytes, 35643392 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 /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 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

如果命令没有指定设备名，则使用/proc/partitions中的设备。

我们可以查看指定磁盘的分区表，比如：

$ sudo fdisk -l /dev/sda

还可以通过执行以下命令来查看分区列表：

$ cat /proc/partitions

输出示例：

major minor  #blocks  name

   2        0          4 fd0
   8        0   20971520 sda
   8        1    1048576 sda1
   8        2   19921920 sda2
  11        0    4669440 sr0
 253        0   17821696 dm-0
 253        1    2097152 dm-1