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- Before I'm going to tell
you how to manage partitions,

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let's talk about disk storage options.

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So to use disk storage,

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partitions should be created

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to divide a disk into one or
more logical areas for storage.

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It's funny

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because technically, you
don't really need a partition.

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You can create a file system
directly on top of a disk,

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but that makes it unrecognizable

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and is really not recommended.

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After creating a partition,

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on that partition, you
will create a filesystem,

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and this filesystem takes
care of the file allocation.

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So the filesystem is a
logical collection of files

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that comes with solutions

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to allocate the file blocks to disk.

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Apart from partitions,

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there are also advanced
storage allocation solutions.

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And these include Logical
Volume Manager, or LVM.

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And this defines flexible
volumes for storage allocation.

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In Red Hat, you will find Stratis,

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which is used for thin
provisioning of storage.

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And volume management
filesystems like ZFS and Btrfs

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combine the storage allocation
unit with a filesystem.

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Different utilities can be
used to create partitions

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including fdisk, parted, and gdisk.

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Now, while working with partitions,

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you should know about block devices.

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That is because the
partitions and the disks

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are addressed as block devices.

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So how do you find your block devices?

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Well, the command to use is lsblk,

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and that will show you
common block devices

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with names like sda,

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where sd indicates that it's SCSI disk,

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and a indicates that it's the first disk.

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There is vda, which is
for a KVM virtual disk

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or xvda, which is a virtual
disk in a Xen environment,

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or nvme0n1, which is the first nvme disk.

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According to the specific driver

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of the hardware that you are using,

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you might even find
different block devices.

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Use lsblk to figure out.

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So on the disk devices,

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partitions are addressed
by adding a number,

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so you will get sda1.

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And sometimes, if the device
name itself contains a number,

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you will have P followed by a number

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like nvme0n1p1

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for partition number one.

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Block device names are
allocated while booting,

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and for that reason, they
are subject to change.

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That means that it's not a very good idea

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to address block devices directly,

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but better use persistent
naming attributes,

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which are labels and UUIDs.

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I'll show you those later.

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For now, I'm going to show
you how to create a partition.