cfdisk - display or manipulate a disk partition table
cfdisk [options] [device]
cfdisk is a curses-based program for partitioning any block
device. The default device is /dev/sda.
Note that cfdisk provides basic partitioning functionality
with a user-friendly interface. If you need advanced features, use
All disk label changes will remain in memory only, and the disk
will be unmodified until you decide to write your changes. Be careful before
using the write command.
Since version 2.25 cfdisk supports MBR (DOS), GPT, SUN and
SGI disk labels, but no longer provides any functionality for CHS
(Cylinder-Head-Sector) addressing. CHS has never been important for Linux,
and this addressing concept does not make any sense for new devices.
Since version 2.25 cfdisk also does not provide a 'print'
command any more. This functionality is provided by the utilities
partx(8) and lsblk(8) in a very comfortable and rich way.
If you want to remove an old partition table from a device, use
Display help text and exit.
Colorize the output. The optional argument when
can be auto, never or always. If the when argument
is omitted, it defaults to auto. The colors can be disabled, for the
current built-in default see --help output. See also the COLORS
Use exclusive BSD lock for device or file it operates.
The optional argument mode can be yes, no (or 1 and 0) or
nonblock. If the mode argument is omitted, it defaults to
"yes". This option overwrites environment variable
$LOCK_BLOCK_DEVICE. The default is not to use any lock at all, but
it’s recommended to avoid collisions with udevd or other tools.
Forced open in read-only mode.
Display version information and exit.
Start with an in-memory zeroed partition table. This
option does not zero the partition table on the disk; rather, it simply starts
the program without reading the existing partition table. This option allows
you to create a new partition table from scratch or from an
The commands for cfdisk can be entered by pressing the
corresponding key (pressing Enter after the command is not
necessary). Here is a list of the available commands:
Toggle the bootable flag of the current partition. This
allows you to select which primary partition is bootable on the drive. This
command may not be available for all partition label types.
Delete the current partition. This will convert the
current partition into free space and merge it with any free space immediately
surrounding the current partition. A partition already marked as free space or
marked as unusable cannot be deleted.
Show the help screen.
Create a new partition from free space. cfdisk
then prompts you for the size of the partition you want to create. The default
size is equal to the entire available free space at the current position.
The size may be followed by a multiplicative suffix: KiB (=1024),
MiB (=1024*1024), and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the
"iB" is optional, e.g., "K" has the same meaning as
Quit the program. This will exit the program without
writing any data to the disk.
Reduce or enlarge the current partition. cfdisk
then prompts you for the new size of the partition. The default size is the
current size. A partition marked as free space or marked as unusable cannot be
Note that reducing the size of a partition might destroy data
on that partition.
Sort the partitions in ascending start-sector order. When
deleting and adding partitions, it is likely that the numbering of the
partitions will no longer match their order on the disk. This command restores
Change the partition type. By default, new partitions are
created as Linux partitions.
Dump the current in-memory partition table to an
sfdisk-compatible script file.
The script files are compatible between cfdisk,
fdisk(8) sfdisk(8) and other libfdisk applications. For more
details see sfdisk(8).
It is also possible to load an sfdisk-script into cfdisk if
there is no partition table on the device or when you start cfdisk
with the --zero command-line option.
Write the partition table to disk (you must enter an
uppercase W). Since this might destroy data on the disk, you must either
confirm or deny the write by entering `yes' or `no'. If you enter `yes',
will write the partition table to disk and then tell the kernel
to re-read the partition table from the disk.
The re-reading of the partition table does not always work. In
such a case you need to inform the kernel about any new partitions by using
partprobe(8) or partx(8), or by rebooting the system.
Toggle extra information about a partition.
Up Arrow, Down Arrow
Move the cursor to the previous or next partition. If
there are more partitions than can be displayed on a screen, you can display
the next (previous) set of partitions by moving down (up) at the last (first)
partition displayed on the screen.
Left Arrow, Right Arrow
Select the preceding or the next menu item. Hitting
Enter will execute the currently selected item.
All commands can be entered with either uppercase or lowercase
letters (except for Write). When in a submenu or at a prompt, you can
hit the Esc key to return to the main menu.
Implicit coloring can be disabled by creating the empty file
See terminal-colors.d(5) for more details about
cfdisk does not support color customization with a
enables cfdisk debug output.
enables libfdisk debug output.
enables libblkid debug output.
enables libsmartcols debug output.
use visible padding characters. Requires enabled
use exclusive BSD lock. The mode is "1" or
"0". See --lock for more details.
Karel Zak <firstname.lastname@example.org>
The current cfdisk implementation is based on the original
cfdisk from Kevin E. Martin <email@example.com>.