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lsblk (list block devices) displays information about block devices in a tree format. Shows disks, partitions, and their mount points in an easy-to-read hierarchy.

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Basic Usage

• lsblk - List all block devices

• lsblk -a - Show all devices

• lsblk -f - Show filesystem information

• lsblk -m - Show mount points

• lsblk -o column1,column2 - Custom output

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Options

• -a - Show all devices

• -f - Show filesystem information

• -m - Show mount points

• -l - Use list format instead of tree

• -n - No headings

• -o columns - Specify output columns

• -b - Print sizes in bytes

• -d - Don't print holder devices

• -e list - Exclude devices by major number

• -i - ASCII characters only

• -p - Print full device paths

• -r - Raw output

• -s - Inverse dependencies

• -S - Sort by size

• -t - Show topology information

• -x column - Sort by column

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Output Columns

• NAME - Device name

• KNAME - Kernel device name

• MAJ:MIN - Major and minor numbers

• FSTYPE - Filesystem type

• MOUNTPOINT - Mount point

• LABEL - Filesystem label

• UUID - Filesystem UUID

• PARTUUID - Partition UUID

• PARTLABEL - Partition label

• SIZE - Size

• TYPE - Device type

• RO - Read-only flag

• RM - Removable device flag

• MODEL - Device model

• SERIAL - Serial number

• STATE - State

• OWNER - Device owner

• GROUP - Device group

• MODE - Device node permissions

• ALIGNMENT - Alignment offset

• MIN-IO - Minimum I/O size

• OPT-IO - Optimal I/O size

• PHY-SEC - Physical sector size

• LOG-SEC - Logical sector size

• ROTA - Rotational device flag

• SCHED - I/O scheduler

• RQ-SIZE - Request queue size

• DISC-ALN - Discard alignment offset

• DISC-GRAN - Discard granularity

• DISC-MAX - Discard max bytes

• DISC-ZERO - Discard zeroes data

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Common Examples

Basic List

lsblk

Show all block devices in tree format.

With Filesystems

lsblk -f

Include filesystem information.

With Mount Points

lsblk -m

Show mount points.

List Format

lsblk -l

Use list instead of tree.

Custom Columns

lsblk -o NAME,SIZE,TYPE,MOUNTPOINT

Show specific columns.

Full Paths

lsblk -p

Show full device paths.

Sort by Size

lsblk -S

Sort devices by size.

All Information

lsblk -f -m -o NAME,SIZE,TYPE,FSTYPE,MOUNTPOINT

Comprehensive view.

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Tips

• Use -f to see filesystem types

• Use -m to see mount points

• Use -o to customize output

• Use -l for script-friendly output

• Use -p for full device paths

• Tree format shows hierarchy clearly

• Essential for disk management

• Great for understanding partition layout