# Bash 的 partx 命令

partx [OPTION]... PARTITION [DISK]

$ sudo partx --show /dev/nvme0n1    # 查看 nvme0n1 的分区
NR   START        END    SECTORS   SIZE NAME UUID
 1    2048    2203647    2201600     1G      dfedd060-593f-48e6-937d-a573d4a95dc5
 2 2203648 1953521663 1951318016 930.5G      4c3ba215-b476-4c6c-a37b-fb13e02d9d46

$ sudo partx -u /dev/nvme0n1        # 更新 nvme0n1 的分区；或
$ sudo partx -a /dev/nvme0n1        # 添加 nvme0n1 的所有分区

$ sudo partx -a -n 1:3 /dev/nvme0n1     # 添加第 1 到 3 个分区

$ sudo partx -d -n 2:3 /dev/nvme0n1     # 删除第 2 到 3 个分区

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
       numbering of on-disk partitions.

OPTIONS
       -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:

           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.

       --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
           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.

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

       -V, --version
           Print version and exit.

ENVIRONMENT
       LIBBLKID_DEBUG=all
           enables libblkid debug output.

EXAMPLE
       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.

AUTHORS
       Davidlohr Bueso <[email protected]>, Karel Zak <[email protected]>

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

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

REPORTING BUGS
       For bug reports, use the issue tracker at
       https://github.com/util-linux/util-linux/issues.

AVAILABILITY
       The partx command is part of the util-linux package which can be
       downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.39.3                 2023-10-23                          PARTX(8)