How to resolve 404 errors while using sudo apt-get update

Question

I found these errors while using sudo apt-get update. I tried to resolve this issue by adding repository using sudo command but it did not resolve yet. It will be helpful if anyone can solve this issue.

Err:26 http://ppa.launchpad.net/marutter/c2d4u/ubuntu artful Release                                                                                                                                       
  404  Not Found

Err:27 http://ppa.launchpad.net/ubuntu-desktop/ubuntu-make/ubuntu artful Release                                                                                                                           
  404  Not Found

Err:28 http://ppa.launchpad.net/webupd8team/gnome3/ubuntu artful Release                                                                                                                                   
  404  Not Found

score 1 · Answer 1 · answered Apr 23 '18 at 03:28

By example in 'how to resolve errors', for the first one, have a look at the site in a browser, when you get to

http://ppa.launchpad.net/marutter/c2d4u/ubuntu/dists/

you'll note there is no "artful" directory - ie. 17.10 isn't supported for this PPA which results in the error you got. Artful is the code name for the 17.10 release

(my answer is worded this way as I read it as you were seeking help in solving issue, rather than quick fix; some PPAs only support LTS releases, or many other reasons)

How to resolve 404 errors while using sudo apt-get update

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