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,
−−addAdd the specified partitions, or read the disk and add all partitions.
−b,
−−bytesPrint the SIZE column in bytes rather than in human-readable format.
−d,
−−deleteDelete the specified partitions or all partitions.
−g,
−−noheadingsDo not print a header line with −−show or −−raw.
−l,
−−listList 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:NSpecify 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:
MSpecifies just one partition (e.g.
−−nr 3).M:Specifies the lower limit only (e.g.
−−nr 2:).- :
NSpecifies the upper limit only (e.g.
−−nr :4).M:NSpecifies the lower and upper limits (e.g.
−−nr 2:4).
−o,
−−output listDefine 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,
−−pairsList the partitions using the KEY="value" format.
−r,
−−rawList the partitions using the raw output format.
−s,
−−showList 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 typeSpecify the partition table type, which can be one of aix, bsd, dos, gpt, mac, minix, sgi, solaris_x86, sun, ultrix, or unixware.
−u,
−−updateUpdate the specified partitions.
−v,
−−verboseVerbose mode.
−V,
−−versionDisplay version information and exit.
−h,
−−helpDisplay help text and exit.
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.
Lists all subpartitions on /dev/sdb3 (the device is used as whole-disk).
Prints the start sector of partition 5 on /dev/sdb without header.
Lists the length in sectors and human-readable size of partition 5 on /dev/sda.
Adds all available partitions from 3 to 5 (inclusive) on /dev/sdd.
Removes the last partition on /dev/sdd.
The partx command is part of the util-linux package and is available from Linux Kernel Archive
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partx.8 -- man page for partx Copyright 2007 Karel Zak <kzakredhat.com> Copyright 2007 Red Hat, Inc. Copyright 2010 Davidlohr Bueso <davegnu.org> May be distributed under the GNU General Public License |