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PARTX(8) System Administration PARTX(8)
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 con-
tents. 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.
-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 out-
put 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.
EXAMPLES
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.
SEE ALSO
addpart(8), delpart(8), fdisk(8), parted(8), partprobe(8)
AUTHORS
Davidlohr Bueso <dave AT gnu.org>
Karel Zak <kzak AT redhat.com>
The original version was written by Andries E. Brouwer <aeb AT cwi.nl>.
ENVIRONMENT
LIBBLKID_DEBUG=all
enables libblkid debug output.
AVAILABILITY
The partx command is part of the util-linux package and is available from Linux Kernel
Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.
util-linux December 2014 PARTX(8)
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