util-linux/disk-utils/partx.8.adoc

//po4a: entry man manual
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partx.8 -- man page for partx
Copyright 2007 Karel Zak <kzak@redhat.com>
Copyright 2007 Red Hat, Inc.
Copyright 2010 Davidlohr Bueso <dave@gnu.org>
May be distributed under the GNU General Public License
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= partx(8)
:doctype: manpage
:man manual: System Administration
:man source: util-linux {release-version}
:page-layout: base
:command: partx

== NAME

partx - tell the kernel about the presence and numbering of on-disk partitions

== SYNOPSIS

*partx* [*-a*|*-d*|*-P*|*-r*|*-s*|*-u*] [*-t* _type_] [*-n* _M_:_N_] [-] _disk_

*partx* [*-a*|*-d*|*-P*|*-r*|*-s*|*-u*] [*-t* _type_] _partition_ [_disk_]

== DESCRIPTION

Given a device or disk-image, *partx* tries to parse the partition table and list its contents. It can also tell the kernel to add or remove partitions from its bookkeeping.

The _disk_ argument is optional when a _partition_ argument is provided. To force scanning a partition as if it were a whole disk (for example to list nested subpartitions), use the argument "-" (hyphen-minus). For example:

____
partx --show - /dev/sda3
____

This will see sda3 as a whole-disk rather than as a partition.

*partx is not an fdisk program* - adding and removing partitions does not change the disk, it just tells the kernel about the presence and numbering of on-disk partitions.

== OPTIONS

*-a*, *--add*::
Add the specified partitions, or read the disk and add all partitions.

*-b*, *--bytes*::
Print the SIZE column in bytes rather than in human-readable format.

*-d*, *--delete*::
Delete the specified partitions or all partitions. It is not error to remove non-existing partitions, so this option is possible to use together with large *--nr* ranges without care about the current partitions set on the device.

*-g*, *--noheadings*::
Do not print a header line with *--show* or *--raw*.

*-l*, *--list*::
List the partitions. Note that all numbers are in 512-byte sectors. This output format is DEPRECATED in favour of *--show*. Do not use it in newly written scripts.

*-n*, *--nr* __M__**:**_N_::
Specify the range of partitions. For backward compatibility also the format __M__**-**_N_ is supported. The range may contain negative numbers, for example *--nr -1:-1* means the last partition, and *--nr -2:-1* means the last two partitions. Supported range specifications are:
+
_M_;;
Specifies just one partition (e.g. *--nr 3*).
__M__**:**;;
Specifies the lower limit only (e.g. *--nr 2:*).
**:**__N__;;
Specifies the upper limit only (e.g. *--nr :4*).
__M__**:**_N_;;
Specifies the lower and upper limits (e.g. *--nr 2:4*).

*-o*, *--output* _list_::
Define the output columns to use for *--show*, *--pairs* and *--raw* output. If no output arrangement is specified, then a default set is used. Use *--help* to get _list_ of all supported columns. This option cannot be combined with the *--add*, *--delete*, *--update* or *--list* options.

*--output-all*::
Output all available columns.

*-P*, *--pairs*::
List the partitions using the KEY="value" format.

*-r*, *--raw*::
List the partitions using the raw output format.

*-s*, *--show*::
List the partitions. The output columns can be selected and rearranged with the *--output* option. All numbers (except SIZE) are in 512-byte sectors.

*-t*, *--type* _type_::
Specify the partition table type.

*--list-types*::
List supported partition types and exit.

*-u*, *--update*::
Update the specified partitions.

*-S*, *--sector-size* _size_::
Overwrite default sector size.

*-v*, *--verbose*::
Verbose mode.

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

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

== ENVIRONMENT

LIBBLKID_DEBUG=all::
enables libblkid debug output.

== EXAMPLE

partx --show /dev/sdb3::
partx --show --nr 3 /dev/sdb::
partx --show /dev/sdb3 /dev/sdb::
All three commands list partition 3 of /dev/sdb.

partx --show - /dev/sdb3::
Lists all subpartitions on _/dev/sdb3_ (the device is used as whole-disk).

partx -o START -g --nr 5 /dev/sdb::
Prints the start sector of partition 5 on _/dev/sdb_ without header.

partx -o SECTORS,SIZE /dev/sda5 /dev/sda::
Lists the length in sectors and human-readable size of partition 5 on _/dev/sda_.

partx --add --nr 3:5 /dev/sdd::
Adds all available partitions from 3 to 5 (inclusive) on _/dev/sdd_.

partx -d --nr :-1 /dev/sdd::
Removes the last partition on _/dev/sdd_.

== AUTHORS

mailto:dave@gnu.org[Davidlohr Bueso],
mailto:kzak@redhat.com[Karel Zak]

The original version was written by mailto:aeb@cwi.nl[Andries E. Brouwer]

== SEE ALSO

*addpart*(8),
*delpart*(8),
*fdisk*(8),
*parted*(8),
*partprobe*(8)

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