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Figure 9.2: Output of the lsblk command
On a typical server, the first disk (basically, the one that you installed Ubuntu Server 
on) will be given a device name of 
/dev/sda
 while additional disks will be given 
the next available name, such as 
/dev/sdb
, 
/dev/sdc
, and so on (depending on the 
type of hard disk you have). Nowadays, 
Non-Volatile Memory Express
 (
NVMe
) 
hard drives are becoming increasingly common, so you may see a device name such 
as 
/dev/nvme0n1p1
. You'll also need to know the partition number. Device names 
for disks will also have numbers at the end, representing individual partitions. For 
example, the first partition of 
/dev/sda
 will be given 
/dev/sda1
, while the second