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When I try to run sudo apt update, I get the following errors for the gnome3 repository. What can I do to solve these error. Is there perhaps a way to revert all my repos back to default? I am running Ubuntu 22.04.3 LTS.

$ sudo apt update
Hit:1 http://security.ubuntu.com/ubuntu jammy-security InRelease                                                       
Hit:2 http://repository.spotify.com stable InRelease                                                                   
Hit:3 http://pk.archive.ubuntu.com/ubuntu jammy InRelease                                                              
Hit:4 https://dl.google.com/linux/chrome/deb stable InRelease                                                          
Hit:5 http://pk.archive.ubuntu.com/ubuntu jammy-backports InRelease                                                    
Hit:6 https://ppa.launchpadcontent.net/andch/staging-fprint/ubuntu jammy InRelease
Hit:7 http://pk.archive.ubuntu.com/ubuntu jammy-updates InRelease                                       
Hit:8 http://archive.ubuntu.com/ubuntu jammy InRelease                                                  
Ign:9 https://ppa.launchpadcontent.net/gnome3-team/gnome3/ubuntu jammy InRelease 
Hit:10 http://archive.ubuntu.com/ubuntu jammy-updates InRelease                   
Ign:11 https://ppa.launchpadcontent.net/gnome3-team/gnome3-staging/ubuntu jammy InRelease
Hit:12 https://ppa.launchpadcontent.net/vala-team/ppa/ubuntu jammy InRelease
Err:13 https://ppa.launchpadcontent.net/gnome3-team/gnome3/ubuntu jammy Release
  404  Not Found [IP: 185.125.190.52 443]
Err:14 https://ppa.launchpadcontent.net/gnome3-team/gnome3-staging/ubuntu jammy Release
  404  Not Found [IP: 185.125.190.52 443]
Reading package lists... Done
E: The repository 'https://ppa.launchpadcontent.net/gnome3-team/gnome3/ubuntu jammy 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.
E: The repository 'https://ppa.launchpadcontent.net/gnome3-team/gnome3-staging/ubuntu jammy 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.
mmaarij
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    You could look at the existing question with the (almost) exact same title.. – Artur Meinild Sep 08 '23 at 14:11
  • PPA's are 3rd party Personal Package Archives or sources, thus all security checks are on you to perform (if you value your system). Picking one of your sources from your paste opens to https://launchpad.net/~gnome3-team/+archive/ubuntu/gnome3 where it's pretty clear to see its abandoned & won't offer anything safe/secure/valuable for your system; why did you add it? – guiverc Sep 08 '23 at 14:12
  • No. I already looked at that post before posting one myself. The other one deals with some other repo while my problem is with the gnome3 repo itself. If there's a way I can apply that solution to my problem then please guide me how to do it. – mmaarij Sep 08 '23 at 14:13
  • You're asking the same question, you just remove the source in whichever method is easiest for you. Using software sources (if you're using a Desktop system), or inside your package tool (a number of options exist here), at terminal using a text editor (I'd use vim but any editor can be used here) etc... or just reverse the steps you used to add that ancient source to your system. – guiverc Sep 08 '23 at 14:17
  • I reversed thru my steps and removed the outdated source. Thank you so much @guiverc! It's been a long day and I tried to install an outdated software by just copying a bunch of commands and running them at once. Oversight on my part. Thanks for the help. – mmaarij Sep 08 '23 at 14:21
  • Glad you got it solved, well done... We all get in a hurry & skip steps now & again, thus creating a mess we need to clean up.. You're not alone ! – guiverc Sep 08 '23 at 14:23

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