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.

       -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.

       -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
       Karel Zak

       The original version was written by Andries E. Brouwer.

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.

util-linux                                        December 2014                                         PARTX(8)