GNU fdisk, lfdisk, gfdisk - manipulate partition tables on a hard drive
fdisk [options] [device]
fdisk is a disk partition manipulation program, which allows you to
create, destroy, resize, move and copy partitions on a hard drive using
a menu-driven interface. It is useful for organising the disk space on
a new drive, reorganising an old drive, creating space for new
operating systems, and copying data to new hard disks. For a list of
the supported partition types, see the --list-partition-types option
It comes in two variants, gfdisk and lfdisk. Lfdisk aims to resemble
Linux fdisk 2.12, while gfdisk supports more advanced disk operations,
like resizing the filesystem, moving and copying partitions. When
starting fdisk, the default is to run gfdisk.
displays a help message.
displays the program’s version.
turns on Linux fdisk compatibility mode. This is the same as
turns off Linux fdisk compatibility mode.
where necessary, prompts for user intervention.
never prompts for user intervention.
lists the partition table on the specified device and exits. If
there is no device specified, lists the partition tables on all
displays a hex dump of the partition table of the disk, similar
to the way Linux fdisk displays the raw data in the partition
use sectors, instead of cylinders for a default unit.
prints the size of the partition on DEVICE is printed on the
displays a list of supported partition types and features.
The following options are available only to lfdisk.
Specify the sector size of the disk. Valid values are 512, 1024
and 2048. Should be used only on older kernels, which don’t
guess the correct sector size.
Specify the number of cylinders of the disk. Currently does
nothing, it is left for Linux fdisk compatibility.
Specify the number of heads of the disk. Reasonable values are
255 or 16.
Specify the number of sectors per track. A reasonable value is
Before editing a BSD disklabel, the partition with the disklabel should
already exist on the disk and be detected by the OS. If you have
created a BSD-type partition, you need to write the changes to the
disk. If fdisk fails to notify the OS about the changes in partition
table, you need to restart your computer. As fdisk tries to guess the
device holding the BSD disklabel, it might fail to edit it at all, even
if the OS has detected it. In this case you are adviced to simply open
the device with fdisk directly. It is possible that it doesn’t work on
some operating systems.
Getting the size of a partition with -s might fail, if fdisk fails to
guess the disk device, for the same reasons as with the previous bug.
mkfs(8), cfdisk(8), parted(8) The fdisk program is fully documented in
the info(1) format GNU fdisk User Manual manual.