LSBLK(8) System Administration LSBLK(8)NAMElsblk - list block devices
SYNOPSISlsblk [options]
lsblk [options] device...
DESCRIPTIONlsblk lists information about all or the specified block devices. The
lsblk command reads the sysfs filesystem to gather information.
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
columns.
OPTIONS-a, --all
List all block devices.
-b, --bytes
Print the SIZE column in bytes rather than in human-readable
format.
-d, --nodeps
Don't print device holders or slaves. For example "lsblk
--nodeps /dev/sda" prints information about the sda device only.
-D, --discard
Print information about the discard (TRIM, UNMAP) capabilities
for each device.
-e, --exclude list
Exclude the devices specified by a comma-separated list of major
device numbers. Note that RAM disks (major=1) are excluded by
default.
-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, --ascii
Use ASCII characters for tree formatting.
-m, --perms
Output info about device owner, group and mode. This option is
equivalent to "-o NAME,SIZE,OWNER,GROUP,MODE".
-l, --list
Use the list output format.
-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.
-P, --pairs
Use key="value" output format.
-r, --raw
Use the raw output format.
-t, --topology
Output info about block device topology. This option is equiva‐
lent to "-o NAME,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-
SEC,ROTA,SCHED,RQ-SIZE".
NOTES
For partitions, some information (e.g. queue attributes) is inherited
from the parent device.
The lsblk needs to be able to lookup sysfs path by major:minor, which
is done done by using /sys/dev/block. The block sysfs appeared in ker‐
nel 2.6.27 (October 2008). In case of problem with new enough kernel
check that CONFIG_SYSFS was enabled at the time of kernel build.
AUTHORS
Milan Broz <mbroz@redhat.com>
Karel Zak <kzak@redhat.com>
SEE ALSOfindmnt(8), blkid(8), ls(1)AVAILABILITY
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 April 2010 LSBLK(8)