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This question already has an answer here:

How to install gnome desktop in ubuntu 17.04?

marked as duplicate by Zanna, muru, edwinksl, Eric Carvalho, karel Apr 18 '17 at 0:36

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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If you already have an existing Ubuntu installation with another or no desktop environment, open a terminal and enter the following:

sudo apt-get install gnome-shell ubuntu-gnome-desktop
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    Is this going o remove unity? or what. Would I have option to choose on login which desktop environment will I use or how do I use gnome? What is the visual difference? Is gnome better supported? Is computer going to be faster? Is resource usage going to be lower? I have so many questions please someone help with answering them. – Luka May 16 '17 at 18:36
  • @luka Then please do some research and ask a new question if needed. You could also try running the command in an Ubuntu VM, if you want to test it for yourself. – wjandrea Jun 12 '17 at 23:27
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    @Luka I'm not sure why they didn't answer your question, after doing the install you should notice a change immediately. When you boot your machine you'll see a new logo and ideally during the install you'll select gdm3 (the gnome display manager) instead of (lightdm) the ubuntu native option. When I did my own install I could only boot with gdm3 as the default. lmk if you have other questions. – davidawad Jun 23 '17 at 13:36
  • Did you notice any speed improvements? Lower resource usage? – Luka Jun 23 '17 at 13:38
  • I needed to install more packages sudo apt install metacity gnome-core gnome-panel before I was able to see a usual gnome UI. – naXa Apr 22 '18 at 18:17

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