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- In this video,

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I would like to explain
what the shell is all about.

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And in order to understand,

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we need to talk about a little
bit about Linux architecture.

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So the heart of Linux is the kernel.

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The kernel is the part that takes care

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of addressing the hardware in your system.

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This kernel comes together
with fundamental libraries.

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These are offered by glibc,

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and you can also consider
glibc an essential component

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of the Linux operating system.

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In these libraries, there
are specific functions

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and in order to use all of
these, we need a user interface

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and the user interface
that will be the shell.

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So the shell bash is a
default shell on Linux.

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The shell is where you as a user are going

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to type your commands.

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So everything you do as a user,

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every command that you
type goes through a shell

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but the shell is not the only thing.

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Apart from that, there
are surfaces as well.

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Surfaces don't need to go through a shell.

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Surfaces would go through
this other component,

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which is called system D.

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System D is the manager of everything

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and as manager of
everything connects directly

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to your glibc and your kernel.

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So it's just a different
route that can be used

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by your services.

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But if it's about typing commands

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and making your life on
a command line easier,

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the shell is what you
should be looking at.