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//po4a: entry man manual
////
Copyright 2010 Jason Borden <jborden@bluehost.com>
This file may be copied under the terms of the GNU Public License.
////
= swaplabel(8)
:doctype: manpage
:man manual: System Administration
:man source: util-linux {release-version}
:page-layout: base
:command: swaplabel
== NAME
swaplabel - print or change the label or UUID of a swap area
== SYNOPSIS
*swaplabel* [*-L* _label_] [*-U* _UUID_] _device_
== DESCRIPTION
*swaplabel* will display or change the label or UUID of a swap partition located on _device_ (or regular file).
If the optional arguments *-L* and *-U* are not given, *swaplabel* will simply display the current swap-area label and UUID of _device_.
If an optional argument is present, then *swaplabel* will change the appropriate value on _device_. These values can also be set during swap creation using *mkswap*(8). The *swaplabel* utility allows changing the label or UUID on an actively used swap device.
== OPTIONS
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*-L*, *--label* _label_::
Specify a new _label_ for the device. Swap partition labels can be at most 16 characters long. If _label_ is longer than 16 characters, *swaplabel* will truncate it and print a warning message.
*-U*, *--uuid* _UUID_::
Specify a new _UUID_ for the device. The _UUID_ must be in the standard 8-4-4-4-12 character format, such as is output by *uuidgen*(1).
== ENVIRONMENT
LIBBLKID_DEBUG=all::
enables libblkid debug output.
== AUTHORS
*swaplabel* was written by mailto:jborden@bluehost.com[Jason Borden] and mailto:kzak@redhat.com[Karel Zak].
== SEE ALSO
*uuidgen*(1),
*mkswap*(8),
*swapon*(8)
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