Provided by: fdisk_2.37.2-4ubuntu3.4_amd64 bug


       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

       Note that cfdisk provides basic partitioning functionality with a user-friendly interface.
       If you need advanced features, use fdisk(8) instead.

       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 wipefs(8).


       -h, --help
           Display help text and exit.

       -L, --color[=when]
           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 section.

           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.

       -r, --read-only
           Forced open in read-only mode.

       -V, --version
           Display version information and exit.

       -z, --zero
           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 sfdisk(8)-compatible script.


       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 "KiB").

           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 resized.

           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 that match.

           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', cfdisk 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 colorization configuration.

       cfdisk does not support color customization with a color-scheme file.


           enables cfdisk debug output.

           enables libfdisk debug output.

           enables libblkid debug output.

           enables libsmartcols debug output.

           use visible padding characters. Requires enabled LIBSMARTCOLS_DEBUG.

           use exclusive BSD lock. The mode is "1" or "0". See --lock for more details.


       Karel Zak <>

       The current cfdisk implementation is based on the original cfdisk from Kevin E. Martin


       fdisk(8), parted(8), partprobe(8), partx(8), sfdisk(8)


       For bug reports, use the issue tracker at


       The cfdisk command is part of the util-linux package which can be downloaded from Linux
       Kernel Archive <>.