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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 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.

       -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,  which can be one of aix, bsd, dos, gpt, mac,
              minix, sgi, solaris_x86, sun, ultrix, or unixware.

       -u, --update
              Update the specified partitions.

       -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 ⟨ftp://ftp.kernel.org/pub/linux/utils/util-linux/⟩.

util-linux                                December 2014                                  PARTX(8)

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