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lsblk Cheatsheet

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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.

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

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

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

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.

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