partx − tell the Linux kernel about the presence and numbering of on-disk partitions
partx
[−a|−d|−s|−u] [−t TYPE]
[−n M:N] [−] disk
partx [−a|−d|−s|−u] [−t TYPE]
partition [disk]
Given a device or disk-image, partx tries to parse the partition table and list its contents. It optionally adds or removes partitions.
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 "-". For example:
partx −−show − /dev/sda3
This will see sda3 as a whole-disk rather than a partition.
The 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 SIZE column in bytes rather than in human-readable format.
−d, −−delete
Delete the specified partitions or all partitions.
−u, −−update
Update the specified partitions.
−g, −−noheadings
Do not print a header line.
−h, −−help
Print a help text and exit.
−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.
−o, −−output list
Define the output columns to use for −−show 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 −−add, −−delete or −−list options.
−P, −−pairs
Output using key="value" format.
−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 lower limit only (e.g. −−nr 2:). | ||
|
:N |
Specifies upper limit only (e.g. −−nr :4). | ||
|
M:N or |
|||
|
M-N |
Specifies lower and upper limits (e.g. --nr 2:4). |
−r, −−raw
Use the raw output format.
−s, −−show
List the partitions. All numbers (except SIZE) are in 512-byte sectors. The output columns can be rearranged with the −−output option.
−t, −−type type
Specify the partition table type aix, bsd, dos, gpt, mac, minix, sgi, solaris_x86, sun, ultrix or unixware.
−v, −−verbose
Verbose mode.
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.
addpart(8), delpart(8), fdisk(8), parted(8), partprobe(8)
The original version was written by Andries E. Brouwer.
LIBBLKID_DEBUG=0xffff
enables debug output.
The partx command is part of the util-linux package and is available from Linux Kernel Archive.