Ubuntu disk partition tool

If you run an Ubuntu 20.04 server, or even a workstation, at some point you’ll probably need to connect an external drive and partition it, format it, and mount it.

Using the Ubuntu GUI is straightforward, but if you’re running a Linux server, you’ll need to do this process using the command line. You can use a new disk or a used disk that you’re wanting to erase. For the purposes of this article, we’ll be formatting the disk using the EXT4 filesystem.

How to Partition, Format, and Mount a Disk on Ubuntu 20.04 Using Command Line

After attaching your disk to the machine, you’ll want to get a list of the disks and find the disk identifier (i.e.

Disk partition in linux command

/dev/sda). To get the disk identifier, run:

sudo fdisk -l

In the following commands, replace /dev/sda with the disk identifier of your drive!

If this is a used drive, you’ll want to delete all existing partitions.

It is good practice to do this on new drives too, just to verify it is a clean drive:

sudo gdisk /dev/sda GPT fdisk (gdisk) version 1.0.5 Part

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