1 .\" Copyright 2000 Andreas Dilger (adilger@turbolinux.com)
3 .\" This man page was created for blkid from e2fsprogs-1.25.
5 .\" This file may be copied under the terms of the GNU Public License.
7 .\" Based on uuidgen, Mon Sep 17 10:42:12 2000, Andreas Dilger
8 .TH BLKID 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
10 blkid \- command\-line utility to locate/print block device attributes
42 program is the command-line interface to working with
44 library. It can determine the type of content (e.g. filesystem, swap)
45 a block device holds, and also attributes (tokens, NAME=value pairs)
46 from the content metadata (e.g. LABEL or UUID fields).
49 has two main forms of operation: either searching for a device with a
50 specific NAME=value pair, or displaying NAME=value pairs for one or
57 instead of reading from the default cache file
59 If you want to start with a clean cache (i.e. don't report devices previously
60 scanned but not necessarily available at this time), specify
64 Display a usage message and exit.
69 output using the specified format. The
75 (only print the value of any tags printed by
79 (only print the device name).
82 Show only the tags for each (specified) device that match
84 It is possible to specify multiple
86 options. If no tag is specified, then all tokens are shown for all
88 In order to just refresh the cache without showing any tokens use
90 with no other options.
93 Search the blkid cache (plus any devices specifed on the command line)
94 for all visible block devices with tokens named
98 and print the name of any devices that are found.
108 Display version number and exit.
112 Write the device cache to
114 instead of writing it to the default cache file
116 If you don't want to save the cache to the default file, specify
118 If not specified it will be the same file as that given by the
123 Display tokens from only the specified device. It is possible to
126 options on the command line. If none is given, all devices which
129 are shown, if they are recognized.
131 If the specified token was found, or if any tags were shown from (specified)
132 devices 0 is returned. If the specified token was not found, or no
133 (specified) devices could be identified, an exit code of 2 is returned.
134 For usage or other errors, an exit code of 4 is returned.
137 was written by Andreas Dilger for libblkid.
140 is part the e2fsprogs package since version 1.26 and is available from
141 http://e2fsprogs.sourceforge.net.