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PARTX(8) System Administration PARTX(8) NAME
partx - tell the Linux kernel about the presence and numbering of on-disk partitions SYNOPSIS
partx [-a|-d|-s|-u] [-t TYPE] [-n M:N] [-] disk partx [-a|-d|-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 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. 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. -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 num- bers, 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. 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 <dave@gnu.org> Karel Zak <kzak@redhat.com> The original version was written by Andries E. Brouwer <aeb@cwi.nl>. ENVIRONMENT
LIBBLKID_DEBUG=0xffff enables 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/>. util-linux June 2012 PARTX(8)
