List the Block devices attached to the system
Handy command for displaying the block devices attached to the system:
lsblk -o name,label,size,fstype,model
NAME LABEL SIZE FSTYPE MODEL
sda 465.8G ST3500418AS
├─sda1 2M ext4
├─sda2 128M ext2
├─sda3 512M swap
└─sda4 465.1G ext4
sdb 1.8T ext3 42AS
├─sdb1 1T ext4
└─sdb2 839G ext4
sr0 1024M DVD+-RW DVD8801