blkid man page on YellowDog

Man page or keyword search:  
man Server   18644 pages
apropos Keyword Search (all sections)
Output format
YellowDog logo
[printable version]

BLKID(8)							      BLKID(8)

NAME
       blkid - command-line utility to locate/print block device attributes

SYNOPSIS
       blkid  [	 -hlv ] [ [ -c cachefile ] -w writecachefile ] [ -o format ] [
       -s tag ] [ -t NAME=value ] [ device ...	]

DESCRIPTION
       The blkid program is the command-line interface to working  with	 libu‐
       uid(3) library.	It can determine the type of content (e.g. filesystem,
       swap) a block device holds, and	also  attributes  (tokens,  NAME=value
       pairs) from the content metadata (e.g. LABEL or UUID fields).

       blkid  has  two	main forms of operation: either searching for a device
       with a specific NAME=value pair, or displaying NAME=value pairs for one
       or more devices.

OPTIONS
       -c     Read  from  cachefile  instead of reading from the default cache
	      file /etc/blkid/blkid.tab.  If you want to start	with  a	 clean
	      cache (i.e. don't report devices previously scanned but not nec‐
	      essarily available at this time), specify /dev/null.

       -h     Display a usage message and exit.

       -l     Look up the device that matches the search  parameter  specified
	      using  the  -t  option, assuming that there is only one matching
	      the search parameter.  For a  system  with  a  large  number  of
	      disks,  this  will  be  more  efficient  by avoiding the need to
	      revalidate devices unless absolutely necessary.  If this	option
	      is  not  specified,  blkid  will	use a less efficient approach,
	      which allows blkid to print all of the devices  that  match  the
	      search parameter.

	      This option is best used for tag searches such as LABEL=data_vol
	      or UUID=e280469a-d06f-4c0b-b068-44f3b576029e.  If you want blkid
	      to  print	 all  of the ext3 filesystems using a search parameter
	      such as TYPE=ext3, then this option should not be used.

       -o     Display blkid's output using the specified format.   The	format
	      parameter	 may  be  full,	 (the default), value, (only print the
	      value of any tags printed by blkid) or device  (only  print  the
	      device name).

       -s     Show  only  the tags for each (specified) device that match tag.
	      It is possible to specify multiple -s options.   If  no  tag  is
	      specified,  then	all  tokens  are  shown	 for  all  (specified)
	      devices.	In order to just refresh the cache without showing any
	      tokens use -s none with no other options.

       -t     Search  for  block  devices with tokens named NAME that have the
	      value value, and display any devices which  are  found.	Common
	      values  for NAME include TYPE, LABEL, and UUID.  If there are no
	      devices specified on the command line, all block devices will be
	      searched;	 otherwise,  only  search the devices specified by the
	      user.

       -v     Display version number and exit.

       -w     <writecachefile>	Write  the  device  cache  to	writecachefile
	      instead	 of   writing	it   to	  the	default	  cache	  file
	      /etc/blkid/blkid.tab.  If you don't want to save	the  cache  to
	      the  default  file, specify /dev/null.  If not specified it will
	      be the same file as that given by the -c option.

       <device>
	      Display tokens from only the specified device.  It  is  possible
	      to  give multiple <device> options on the command line.  If none
	      is given, all  devices  which  appear  in	 /proc/partitions  are
	      shown, if they are recognized.

RETURN CODE
       If the specified token was found, or if any tags were shown from (spec‐
       ified) devices 0 is returned.  If the specified token was not found, or
       no  (specified)	devices	 could	be  identified,	 an  exit code of 2 is
       returned.  For usage or other errors, an exit code of 4 is returned.

AUTHOR
       blkid was written by Andreas Dilger for libblkid.

AVAILABILITY
       blkid is part the e2fsprogs package since version 1.26 and is available
       from http://e2fsprogs.sourceforge.net.

SEE ALSO
       libblkid(3)

E2fsprogs version 1.39		   May 2006			      BLKID(8)
[top]

List of man pages available for YellowDog

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net