lsblk Command Cheat Sheet

The lsblk command lists information about block devices such as disks, partitions, and logical volumes. It displays the device hierarchy in a tree-like format.

Basic Usage

Lists all block devices.

lsblk

NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0  100G  0 disk
├─sda1   8:1    0   96G  0 part /
└─sda2   8:2    0    4G  0 part [SWAP]

List All Devices Including Empty

Shows devices even if they have no filesystem or mountpoint.

lsblk -a

loop0  7:0  0  55M  1 loop

Show Filesystem Information

Displays filesystem type, UUID, and labels.

lsblk -f

NAME   FSTYPE LABEL UUID                                 MOUNTPOINT
sda1   ext4         9e3b...

Show Permissions and Ownership

Includes device permissions, owner, and group.

lsblk -m

NAME  MODE   OWNER GROUP
sda   brw-rw---- root disk

Show Only Disks

Filters output to show disks only.

lsblk -d

NAME  SIZE TYPE
sda   100G disk

Output as List (No Tree)

Displays output without the tree hierarchy.

lsblk -l

sda   disk 100G
sda1  part 96G

Select Specific Columns

Shows only specified columns.

lsblk -o NAME,SIZE,TYPE,MOUNTPOINT

NAME  SIZE TYPE MOUNTPOINT
sda1  96G  part /

Show Transport Type

Displays the transport type (USB, SATA, NVMe).

lsblk -o NAME,TRAN

NAME TRAN
sdb  usb

Show JSON Output

Outputs device information in JSON format.

lsblk -J

{
  "blockdevices": [
    {
      "name": "sda",
      "size": "100G",
      "type": "disk"
    }
  ]
}

Exclude Loop Devices

Hides loop devices from output.

lsblk -e 7

sda
├─sda1