The first thing we need is known tweak tools in order to change the install themes
So just let's install it first from open to software center, you can also use the terminal
but I'm using the just so that everyone can use it. So once you have that
you can just launch it and there you can see that there is option to change the themes and icons
So let's let's get a theme first. My favorite test time is Pop Os
We can get it from its github repository. Uh If you scroll down
you will see some commands to install this time automatically using the P P A
And we're going to use this plus where you will be automatically getting the updates on the themes and icons
So I prefer to use the office or P P for themes and icons because they are continually updated
So you get uh icons for the new applications which might not be
you know, created for when the theme was developed. So let's just run those famous three commands to first add
the repository, update the repository and then we'll install it while it takes some time
Uh Well, it does take some time. So why not we? OK
OK. Just install it. Uh This single command will install both icons and the G T K three
theme and also the, the Gnome shell theme. So one command to install all three of them
you can also install them individually. Um I'm going to show you where exactly you can get new themes
So this is the official Gnome website G nom look and here you can get icon themes
G T K three themes and non shell themes. What you need is three things
GT K three icon themes and shell themes. So in, as I said
we can install them individually. So in this case, I'm using uh I'm going to download a G T K three theme
So remember to download G T K three, not G T K two because uh the modern known version uses G
T K three framework. So we have downloaded a G T K three themes
We are also, we have also installed all three themes using the pops uh P
P A. So let's see how to change that. Just run the themes
uh tweaks to. And then from there, you can use the applications option
This is where the G T K three themes comes in action actually
So you can see the theme, uh the application theme has been changed and then you change the icons and
then it's time for maybe shell which actually changes a few things on the panel
top panel and the desktop notifications. We'll see that how to change that in a few moments
So this is the new icon theme. So it looks lovely. It's my favorite
I mean, it's being developed by system 76 U two laptop vendor and it's fabulous
So just control edge to show the hidden files and create dot themes directory and
dot icons to if they are not already existing, what we are going to do is remember we downloaded the
the G T K three themes called and we're going to see the second method of uh second way of using um installing
themes in 12, 17.10 or maybe 18.4 as well. So just extract the file
copy, paste it into the themes folder because it was GT three themes
We are we copy pasting it in the, the folder. If it was icon
we should have used the icons folder. So it won't reflect right away because you have to actually restart known tweaks
And after that, you'll see the new theme here. And as you can see
it's a, it's another beautiful theme actually. So that's one way of doing that
Uh Let's talk about the Gnome shell stuff for that. We need to install Gnome extensions
There's, there are uh several ways, not several, but there's like 23 ways to get the Gnome shell extensions
Uh Open two or other distribution provide a package of extension which you can install using the command
which I just showed. And then when you do the uh open the tweaks folder
you will see there are some extensions available and here you just need to enable user themes extension
And after that, it won't take immediate effect. So you have to restart the window tweaks
sorry. No tweaks to. And when you do that now you'll see that the red or the triangle has gone and you can change the
theme here and you can see on the top panel that things have changed
it is more integrated that way. How let me see this is the default notification of the
ambience theme. But if you change it to box, you can see that it's in
it's using the elements of the theme now. So this is how this known shell is different from the GT K three
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