Linux fdisk command

Linux Command Reference

Linux fdisk is a program that creates and maintains partition tables. It is compatible with DOS-type partition tables and BSD or SUN-type disk lists.

Syntax

fdisk [必要参数][选择参数]

Required parameters:

• -l List all partition tables
• -u with-lUse together to display the number of partitions

Optional parameters:

• -s<partition number> Specify partition
• -v Version information

Menu operation instructions

• m: Show menu and help information
• a: Active partition flag / boot partition
• d: Delete partition
• l: Display partition types
• n: Create a new partition
• p: Display partition information
• q: Quit without saving
• t: Set partition number
• v: Perform partition check
• w: Save changes
• x: Extended application, advanced functions

Examples

Display current partition status:

# fdisk -l

Disk /dev/sda: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

  Device Boot   Start     End   Blocks  Id System
/dev/sda1  *      1     13   104391  83 Linux
/dev/sda2       14    1305  10377990  8e Linux LVM

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

Display the partition information of each SCSI hard disk

# fdisk -lu  

Disk /dev/sda: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders, total 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes

  Device Boot   Start     End   Blocks  Id System
/dev/sda1  *     63   208844   104391  83 Linux
/dev/sda2     208845  20964824  10377990  8e Linux LVM

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders, total 10485760 sectors
Units = sectors of 1 * 512 = 512 bytes

Disk /dev/sdb doesn't contain a valid partition table

Linux Command Reference