lsblk lists information about all available or the specified block
devices. The lsblk command reads the sysfs filesystem and udev db to
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
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.
Note that lsblk might be executed in time when udev does not have all
information about recently added or modified devices yet. In this
case it is recommended to use udevadm settle before lsblk to
synchronize with udev.
Also list empty devices. (By default they are skipped.)
Print the SIZE column in bytes rather than in a human-readable
Print information about the discarding capabilities (TRIM,
UNMAP) for each device.
Do not print holder devices or slaves. For example, lsblk--nodeps /dev/sda prints information about the sda device
-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
Output info about filesystems. This option is equivalent to
-o NAME,FSTYPE,LABEL,UUID,MOUNTPOINT. The authoritative
information about filesystems and raids is provided by the
Display 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
Use ASCII characters for tree formatting.
Use JSON output format.
Produce output in the form of a list.
Output info about device owner, group and mode. This option
is equivalent to -o NAME,SIZE,OWNER,GROUP,MODE.
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).
Output all available columns.
Produce output in the form of key="value" pairs. All
potentially unsafe characters are hex-escaped (\x<code>).
Print full device paths.
Produce output in raw format. All potentially unsafe
characters are hex-escaped (\x<code>) in the NAME, KNAME,
LABEL, PARTLABEL and MOUNTPOINT columns.
Output info about SCSI devices only. All partitions, slaves
and holder devices are ignored.
Print dependencies in inverse order.
Output info about block-device topology. This option is
equivalent to -o NAME,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-SEC,ROTA,SCHED,RQ-SIZE,RA,WSAME.
Display version information and exit.
-x, --sort column
Sort output lines by column.
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.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
firstname.lastname@example.org. This page was obtained from the
project's upstream Git repository
2016-09-01. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to email@example.com
util-linux February 2013 LSBLK(8)