1LSBLK(8) System Administration LSBLK(8)
2
6 lsblk - list block devices
7
9 lsblk [options] [device...]
10
12 lsblk lists information about all available or the specified block
13 devices. The lsblk command reads the sysfs filesystem and udev db to
14 gather information. If the udev db is not available or lsblk is
15 compiled without udev support, then it tries to read LABELs, UUIDs and
16 filesystem types from the block device. In this case root permissions
17 are necessary.
18 The command prints all block devices (except RAM disks) in a tree-like
20 format by default. Use lsblk --help to get a list of all available
21 columns.
22 The default output, as well as the default output from options like
24 --fs and --topology, is subject to change. So whenever possible, you
25 should avoid using default outputs in your scripts. Always explicitly
26 define expected columns by using --output columns-list and --list in
27 environments where a stable output is required.
28 Note that lsblk might be executed in time when udev does not have all
30 information about recently added or modified devices yet. In this case
31 it is recommended to use udevadm settle before lsblk to synchronize
32 with udev.
33 The relationship between block devices and filesystems is not always
35 one-to-one. The filesystem may use more block devices, or the same
36 filesystem may be accessible by more paths. This is the reason why
37 lsblk provides MOUNTPOINT and MOUNTPOINTS (pl.) columns. The column
38 MOUNTPOINT displays only one mount point (usually the last mounted
39 instance of the filesystem), and the column MOUNTPOINTS displays by
40 multi-line cell all mount points associated with the device.
41
43 -A, --noempty
44 Don’t print empty devices.
45 -a, --all
47 Disable all built-in filters and list all empty devices and RAM
48 disk devices too.
49 -b, --bytes
51 Print the sizes in bytes rather than in a human-readable format.
52 By default, the unit, sizes are expressed in, is byte, and unit
54 prefixes are in power of 2^10 (1024). Abbreviations of symbols are
55 exhibited truncated in order to reach a better readability, by
56 exhibiting alone the first letter of them; examples: "1 KiB" and "1
57 MiB" are respectively exhibited as "1 K" and "1 M", then omitting
58 on purpose the mention "iB", which is part of these abbreviations.
59 -D, --discard
61 Print information about the discarding capabilities (TRIM, UNMAP)
62 for each device.
63 -d, --nodeps
65 Do not print holder devices or slaves. For example, lsblk --nodeps
66 /dev/sda prints information about the sda device only.
67 -E, --dedup column
69 Use