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This is what I see:

screenshot of my terminal

Maybe I should add some files to some directory. I'm extremely new to ubuntu so please give a detailed solution.

muru
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user
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  • @karel how this Q&A differs from yours https://askubuntu.com/a/1260500/66509 ? It seems that you use the gold power in wrong manner. Being potential newbie OP may not have enough expertise to analyze and implement solution from "duplicate"... – N0rbert Jul 21 '20 at 08:08
  • @N0rbert I actually reviewed this question twice.The first time reviewing it from the review queue I caught it. The second time I didn't, so I voted to reopen it. – karel Jul 21 '20 at 08:19

1 Answers1

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Here you have two problems with repositories - they do not have packages for Ubuntu 20.04 LTS.

So you need to remove these repositories at first with

sudo add-apt-repository -r ppa:danielrichter2007/grub-customizer
sudo add-apt-repository -r ppa:ppsspp/stable

and then add repository which provides ppsspp package:

sudo add-apt-repository ppa:samoilov-lex/retrogames
sudo apt-get update
sudo apt-get install ppsspp
N0rbert
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