blkid

TLDR

List all partitions

$ sudo blkid

List all partitions in a table including mountpoints

$ sudo blkid -o list

Get the UUID of a specific partition

$ sudo blkid -s UUID -o value [/dev/sdXY]

Get the filesystem type of a partition

$ sudo blkid -s TYPE -o value [/dev/sdXY]

SYNOPSIS

blkid [-o format] [-s tag] [device...]

blkid lists all recognized partitions and their attributes including Universally Unique Identifier (UUID), filesystem type, and label. It uses the libblkid library to locate and identify block devices.

PARAMETERS

-o, --output format

Output format: full, value, list, device, udev, export

-s, --match-tag tag

Show only the specified tag (UUID, TYPE, LABEL, etc.)

-c, --cache-file file

Read from specified cache file instead of default

-g, --garbage-collect

Perform garbage collection on the blkid cache

-l, --list-one

Look up only one device matching parameters

-L, --label label

Look up device by filesystem label

-U, --uuid uuid

Look up device by filesystem UUID

-p, --probe

Low-level superblock probing mode (bypass cache)

-i, --info

Print I/O limits (sector size, etc.)

CAVEATS

Output format varies by option. Running without arguments shows all block devices. Results may be cached; use -p for live probing.

HISTORY

Part of util-linux package. Developed to provide a unified interface for identifying block device attributes.