Provided by: util-linux_2.38-4ubuntu1_amd64 bug


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


       partx [-a|-d|-P|-r|-s|-u] [-t type] [-n M:_N_] [-] disk

       partx [-a|-d|-P|-r|-s|-u] [-t type] partition [disk]


       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.


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

       -b, --bytes
           Print the sizes in bytes rather than in a human-readable format.

           By default, the unit, sizes are expressed in, is byte, and unit prefixes are in power
           of 2^10 (1024). Abbreviations of symbols are exhibited truncated in order to reach a
           better readability, by exhibiting alone the first letter of them; examples: "1 KiB"
           and "1 MiB" are respectively exhibited as "1 K" and "1 M", then omitting on purpose
           the mention "iB", which is part of these abbreviations.

       -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:

               Specifies just one partition (e.g. --nr 3).

               Specifies the lower limit only (e.g. --nr 2:).

               Specifies the upper limit only (e.g. --nr :4).

               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 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 supported partition types and exit.

       -u, --update
           Update the specified partitions.

       -S, --sector-size size
           Overwrite default sector size.

       -v, --verbose
           Verbose mode.

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

       -V, --version
           Print version and exit.


           enables libblkid debug output.


       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.


       Davidlohr Bueso <>, Karel Zak <>

       The original version was written by Andries E. Brouwer <>


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


       For bug reports, use the issue tracker at


       The partx command is part of the util-linux package which can be downloaded from Linux
       Kernel Archive <>.