partx

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  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  num-
       bering of on-disk partitions.

OPTIONS
       -a, --add
              Add  the specified partitions, or read the disk and add all par-
              titions.

       -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 sec-
              tors.  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  nega-
              tive  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, --up-
              date 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 re-
              arranged  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@gnu.org>
       Karel Zak <kzak@redhat.com>

       The original version was written by Andries E. Brouwer <aeb@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)