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In this video, I'll show you how to create MBR primary partitions using the fdisk utility.

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In case you are wondering, do we still need to know about that? Yes, because you want

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to pass Linux Plus and also because in some systems you'll still encounter MBR partitions.

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You know, some Linux systems stay around for a long time, and if you want to be certified

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to manage them, you better have some basic skills regarding MBR. For this demo, I've

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used my virtualization layer to add some storage. If we use LSB-LK, we can find information

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about it. Hey, talking about changing device names, do you see that? I was just talking

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about it. And the device previously known as dev-nvme-0-n1 has now suddenly changed

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to dev-nvme-0-n3. But fortunately, FSTEP is using UUIDs, and these UUIDs are written

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on the device itself, so that will always correctly be detected. I'm going to use fdisk

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on dev-nvme-0-n1, and that is my first disk. Always make sure that you use your partitioning

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utility on a disk. You can't use it on a partition. Now, we can see that FVS is telling us that

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the device does not contain a partition table, and it created a new DOS or MBR disk label,

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and that's exactly what we want. You can also use M for help. You should see that as M for

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menu because you can see all the useful options in this menu. And there's a couple of options

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that I like. To start with, the option P. Let me put it on the top of my screen. P is

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for print. So here we can find some generic disk information, including that this is a

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20-gigabyte disk. This is the amount of bytes, and we are using sectors with the size of

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512 bytes. Now, let me use N to create a new partition. And there we have the choice between

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primary or extended. Remember, in MBR, you can only address four partitions. But as this

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is the first one, I'm going to start with a primary partition, partition number one.

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The first sector starts at 2048. In case you are wondering, why doesn't it start at the

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beginning? Well, there's a simple explanation. Every disk, the first megabyte is reserved

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for metadata storage, administrative information about what you are doing on your disk. So

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your first partition will always start at MB number one. Then it's asking for the size.

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In the last sector, well, I'm going for the plus size in KMGT or P. So I'm using plus

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one uppercase G. Don't forget, Linux is case-sensitive. Lowercase G is really not going to work. And

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now we can see that the new partition one of type Linux and a size of one gigabyte has

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been set. It's a good idea to verify that using P for print partition table. And here

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we can see that the device NVMe 0 and 1P1 has been added. If that is what you wanted,

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use W to write, and then use LSB OK to verify that the new partition is visible. And as

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you can see, it is visible. So mission accomplished. We still need to create a file system on top

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of it. I'm showing you how to work with file systems in one of the upcoming videos.