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
   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, 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 [email protected]
   Karel Zak [email protected]

   The original version was written by Andries E. Brouwer [email protected].

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/.

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