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24.4. Viewing Block Devices and File Systems

24.4.1. Using the lsblk Command
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The lsblk command allows you to display a list of available block devices. To do so, type the following at a shell prompt: 
lsblk
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For each listed block device, the lsblk command displays the device name (NAME), major and minor device number (MAJ:MIN), if the device is removable (RM), what is its size (SIZE), if the device is read-only (RO), what type is it (TYPE), and where the device is mounted (MOUNTPOINT). For example: 
~]$ lsblk
NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sr0                        11:0    1  1024M  0 rom
vda                       252:0    0    20G  0 rom
|-vda1                    252:1    0   500M  0 part /boot
`-vda2                    252:2    0  19.5G  0 part
  |-vg_kvm-lv_root (dm-0) 253:0    0    18G  0 lvm  /
  `-vg_kvm-lv_swap (dm-1) 253:1    0   1.5G  0 lvm  [SWAP]
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By default, lsblk lists block devices in a tree-like format. To display the information as an ordinary list, add the -l command-line option: 
lsblk -l
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For instance: 
~]$ lsblk -l
NAME                  MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sr0                    11:0    1  1024M  0 rom
vda                   252:0    0    20G  0 rom
vda1                  252:1    0   500M  0 part /boot
vda2                  252:2    0  19.5G  0 part
vg_kvm-lv_root (dm-0) 253:0    0    18G  0 lvm  /
vg_kvm-lv_swap (dm-1) 253:1    0   1.5G  0 lvm  [SWAP]
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For a complete list of available command-line options, see the lsblk(8) manual page.
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