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LSBLK(8)		     System Administration		      LSBLK(8)

       lsblk - list block devices

       lsblk [options] [device...]

       lsblk  lists  information  about	 all  available or the specified block
       devices.	 The lsblk command reads the sysfs filesystem to gather infor-

       The  command prints all block devices (except RAM disks) in a tree-like
       format by default.  Use lsblk --help to get a  list  of	all  available

       The  default  output,  as  well as the default output from options like
       --fs and --topology, is subject to change.  So whenever	possible,  you
       should  avoid using default outputs in your scripts.  Always explicitly
       define expected columns by using --output columns-list in  environments
       where a stable output is required.

       -a, --all
	      Also list empty devices.	(By default they are skipped.)

       -b, --bytes
	      Print  the  SIZE column in bytes rather than in a human-readable

       -D, --discard
	      Print  information  about	 the  discarding  capabilities	(TRIM,
	      UNMAP) for each device.

       -d, --nodeps
	      Do  not  print  holder  devices  or  slaves.  For example, lsblk
	      --nodeps /dev/sda prints information about the sda device only.

       -e, --exclude list
	      Exclude the devices specified by	the  comma-separated  list  of
	      major  device  numbers.	Note  that  RAM	 disks	(major=1)  are
	      excluded by default.  The filter is  applied  to	the  top-level
	      devices only.

       -f, --fs
	      Output  info  about  filesystems.	  This option is equivalent to
	      -o NAME,FSTYPE,LABEL,MOUNTPOINT.	The authoritative  information
	      about filesystems and raids is provided by the blkid(8) command.

       -h, --help
	      Print a help text and exit.

       -I, --include list
	      Include  devices	specified by the comma-separated list of major
	      device numbers.  The filter is applied to the top-level  devices

       -i, --ascii
	      Use ASCII characters for tree formatting.

       -l, --list
	      Produce output in the form of a list.

       -m, --perms
	      Output  info about device owner, group and mode.	This option is
	      equivalent to -o NAME,SIZE,OWNER,GROUP,MODE.

       -n, --noheadings
	      Do not print a header line.

       -o, --output list
	      Specify which output columns to print.  Use --help to get a list
	      of all supported columns.

	      The default list of columns may be extended if list is specified
	      in the format +list (e.g. lsblk -o +UUID).

       -P, --pairs
	      Produce output in the form of  key="value"  pairs.   All	poten-
	      tially unsafe characters are hex-escaped (\x<code>).

       -p, --paths
	      Print full device paths.

       -r, --raw
	      Produce output in raw format.  All potentially unsafe characters
	      are hex-escaped (\x<code>) in the NAME, KNAME, LABEL,  PARTLABEL
	      and MOUNTPOINT columns.

       -S, --scsi
	      Output info about SCSI devices only.  All partitions, slaves and
	      holder devices are ignored.

       -s, --inverse
	      Print dependencies in inverse order.

       -t, --topology
	      Output info about block-device topology.	This option is equiva-

       -V, --version
	      Output version information and exit.

       For partitions, some information (e.g. queue attributes)	 is  inherited
       from the parent device.

       The  lsblk  command  needs  to  be able to look up each block device by
       major:minor numbers, which is done by using /sys/dev/block.  This sysfs
       block  directory	 appeared in kernel 2.6.27 (October 2008).  In case of
       problems with a new enough kernel, check that CONFIG_SYSFS was  enabled
       at the time of the kernel build.

       Milan Broz <mbroz@redhat.com>
       Karel Zak <kzak@redhat.com>

       Setting LIBMOUNT_DEBUG=0xffff enables debug output.

       findmnt(8), blkid(8), ls(1)

       The  lsblk  command  is part of the util-linux package and is available
       from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux			 February 2013			      LSBLK(8)