lsblk Linux Command Guide

The lsblk command in Linux is used to list block devices along with information about their sizes, mount points, and filesystem types. It provides a clear overview of the storage devices connected to the system, making it easier to identify and manage storage devices. By default, lsblk displays information in a tree-like format, showing the relationships between different devices. This command is useful for system administrators and users who need to gather information about block devices on their Linux system.

lsblk Syntax:

lsblk [options] [parameters]

Options:

Option	Description
-a, —all	List all devices
-d, —nodeps	Do not print slaves, holders and partmaps
-e, —exclude	Excludes the specified major-minor device number
-f, —fs	Output info on filesystems
-i, —ascii	Output ASCII parttable
-l, —list	Output in list format
-m, —scsi	Output info in SCSI generic mode
-n, —noheadings	Do not print a header line
-o, —output	Specify columns to display
-p, —pairs	Produce output suitable for parsing

Parameters:

Parameter	Description
PATH	Specify a device or mount point to list information
DEVICE	Specifying the device to list information
-a, —all	List all devices
-b, —bytes	Print size in bytes
-h, —human	Print sizes in human readable format
-t, —topology	Output info in topology format

Caution

Exercise caution when using the lsblk command, especially when manipulating or formatting devices, as it may lead to data loss.

lsblk Command Samples:

List all block devices

lsblk

Display information about all available block devices.

List block devices with additional information

lsblk -a

Display all block devices including virtual ones.

Display all available block devices including loop devices

lsblk -l

Show all block devices, including loop devices.

Show only the block devices in a tree-like format

lsblk -t

Display block devices in a tree-like format.

Show all block devices with filesystem information

lsblk -f

Display all block devices with filesystem information included.

Display block devices and additional metadata

lsblk -m

Show block devices with additional metadata information.

Show all block devices with information in JSON format

lsblk -J

Display block devices along with metadata in JSON format.

Tip

When using the lsblk command, make sure to run it with appropriate permissions, as viewing block devices may require administrative privileges.

How do I list all block devices in Linux using lsblk?

To list all block devices in Linux with lsblk, run the following command:

lsblk

How can I display more details, including mount points, with lsblk in Linux?

To display more details, including mount points, when using lsblk in Linux, use the following command:

lsblk -f

How can I show the size of each block device in lsblk on Linux?

To show the size of each block device when using lsblk in Linux, execute the following command:

lsblk -b

How do I display the tree-like format of partitions with lsblk in Linux?

To display the tree-like format of partitions using lsblk in Linux, use the following command:

lsblk -i

How can I list all USB devices in Linux using lsblk?

To list all USB devices in Linux with lsblk, run the following command:

lsblk -d -o name,tran,rm,type

How can I list only specific block devices using lsblk in Linux?

To list only specific block devices with lsblk in Linux, use the following command, replacing <device> with the device name:

lsblk /dev/<device>

Applications of the lsblk command

• Viewing information about block devices
• Listing details about storage devices and their partitions
• Checking the device name, size, type, and mount points
• Displaying hierarchical information about the storage devices
• Assisting in identifying disk and partition information
• Providing an overview of the block devices available on the system