.\" Copyright 2010 Jason Borden <jborden@bluehost.com>
.\"
.\" This file may be copied under the terms of the GNU Public License.
.\"
.TH SWAPLABEL 8 "2 April 2010" "Linux" "Linux Programmer's Manual"
.SH NAME
swaplabel \- Print or change the label / UUID of a swap area
.SH SYNOPSIS
.B swaplabel
.RB [ \-L
.IR label ]
.RB [ \-U
.IR UUID ]
.I device
.SH DESCRIPTION
.B swaplabel
will display or change the label / UUID of a swap partition located on
.IR device 
(or regular file).
.PP
If the optional arguments
.B \-L 
and
.B \-U 
are not present,
.B swaplabel
will simply display the swap area label and UUID of
.IR device .
.PP
If an optional argument is present, then
.B swaplabel
will change the appropriate value of
.IR device .
These values can also be set during swap creation using
.BR mkswap (8).
The
.B swaplabel
utility allows to change the label or UUID on actively used swap device.
.SH OPTIONS
.IP "\fB\-h, \-\-help\fP"
Print help and exit.
.IP "\fB\-L, \-\-label\fP \fIlabel\fP"
Specify a new label for
.IR device .
Swap partition labels can be at most 16 characters long.  If
.IR label
is longer than 16 characters,
.B swapinfo
will truncate it and print a warning message.
.IP "\fB\-U, \-\-uuid\fP \fIuuid\fP"
Specify a new UUID for
.IR device .
.IR UUID
must be in the standard 8-4-4-4-12 character format, such as is output by
.BR uuidgen (1) .
.PP
.SH AUTHOR
.B swaplabel
was written by Jason Borden <jborden@bluehost.com> and Karel Zak <kzak@redhat.com>.
.SH AVAILABILITY
.B swaplabel
is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
.SH SEE ALSO
.BR mkswap (8),
.BR swapon (8),
.BR uuidgen (1)