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- So now that we've created our partitions

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let's create some file systems.

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First we are going to have a look at ext4.

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There are three utilities that matter

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or only just two mkfs.ext4 is a utility

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that you use to create
an ext4 file system.

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And then there is tune2fs

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which can be used to tune ext4 properties.

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The name of this utility
is funny: Tune2fs.

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It contains the letters E2,

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and E2 that is ext2.

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And that is because this
utility goes all the way

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down to the ext2 period,

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which was the original file
system that was introduced

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with Linux in 1992.

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Many of the utilities that come

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with ext4 still are from that period.

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And if you wanna know what you can do

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with ext4 properties, try tune2fs-l,

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that will list all the properties
that are currently used.

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Let me show you.

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All right, so let me start with lsblk.

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I'm going to work on
sdb1, mkfs dot tap, tap.

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It's always a good idea
to use tap completion.

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This is showing what you
have available and we can see

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on this center S system
that I have all the exts,

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vfat as well as xfs.

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Well ext4 is what we wanna do here.

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It's the most recent
version of ext file system

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and there's no reason to
use ext2 or ext3 nowadays.

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I do advise you use minus, minus help

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for an overview of all
the different options.

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There are specific
options that you can set,

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but in most cases,

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apart from the volume label and the UUID,

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there's no real reason to
set any of these options.

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So just mkfs dot ext4

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on dev sdb1 will do.

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And there we go.

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And now it's already formatted.

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That means that

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at this point I can
mount it, mount dev sdb1

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on slash mnt using slash mnt

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because that directory was designed

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as a temporary mount point.

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And as you can see, that is working.

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Going to U-mount it

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and I want to show you
tune2FS-L on dev SDB1,

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which is showing all the
different options that can be set

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on the file system.

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This is coming

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from what we call the
file system super block.

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And in the super block all
these options are stored.

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So that contains information

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like when was it last mounted,

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which features are supported

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do we have specific mount
options and many, many more.

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As I just told you,

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it's nice to see that these
options are available.

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But where, in the past,

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sometimes specific options were used

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to have your file system
behave differently,

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nowadays the file systems
normally contain everything

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that you need and these
options are, are rarely used.