$ sudo apt update && sudo apt upgrade -y Hit:1 focal InRelease Hit:2 focal-updates InRelease Hit:3 focal-backports InRelease Hit:4 focal InRelease Hit:5 focal-pgdg InRelease Hit:6 focal-security InRelease Hit:7 focal InRelease Hit:8 stable InRelease Hit:9 focal InRelease Hit:10 focal InRelease Hit:11 focal InRelease Hit:12 focal InRelease Hit:13 focal InRelease Ign:14 focal InRelease Err:15 focal Release 404 Not Found [IP: 91.189.95.85 80] Reading package lists... Done E: The repository ' focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.

Whenever I try to do sudo apt update it gives me this error and exits, I don't remember the way in which I installed sublime text throught terminal as it was 2 weeks ago, is there a way to solve this

I followed this tutorial to download sublime text from this heading

Installing Sublime Text on Linux Mint /Ubuntu– The Better Method

I also tried uninstalling it but that didn't work

$ sudo snap remove sublime-text sublime-text removed

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1 Answer

Remove the outdated PPA

The webupd8 PPA has not been updated since 2018, and does not support Ubuntu 20.04.

Remove it with

sudo add-apt-repository --remove ppa:webupd8team/sublime-text-2

Install Sublime Text 4 from its official repository

The instructions for Installing sublime text can be found at its website.

First, install the GPG key:

wget -qO - | sudo apt-key add -

Then enable https sources in apt

sudo apt-get install apt-transport-https

For the stable version, enter the command

echo "deb apt/stable/" | sudo tee /etc/apt/sources.list.d/sublime-text.list

Update apt index and install Sublime Text

sudo apt update sudo apt install sublime-text
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