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when I do sudo apt-get update I get these errors,

Err http://ppa.launchpad.net trusty/main amd64 Packages 404  Not Found
Err http://ppa.launchpad.net trusty/main i386 Packages  404  Not Found
W: Failed to fetch http://ppa.launchpad.net/adilson/experimental/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found
W: Failed to fetch http://ppa.launchpad.net/adilson/experimental/ubuntu/dists/trusty/main/binary-i386/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.

I have no idea what launchpad is. what this error is? what this error points to?

How can I remove this error?

Thanks.

x0x
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  • i have tried a lot of questions, and deleted the cache, still this error is showing. sorry – x0x Aug 05 '14 at 18:20
  • did you add a ppa? – Tim Aug 05 '14 at 18:21
  • i'm sorry i dont know with what ppa is installed! – x0x Aug 05 '14 at 18:22
  • Okay, you didn't add a ppa then :) – Tim Aug 05 '14 at 18:25
  • @John: Do you have any files in /etc/apt/sources.list.d/? If so (and they end in .list), these files are additional repositories that apt can get packages from. One of these is likely to be the PPA that is referenced above. – saiarcot895 Aug 05 '14 at 18:32
  • Yeah there exist 13 files, does deleting these files fix the problem? – x0x Aug 05 '14 at 18:35
  • once tried installing wine :) – x0x Aug 05 '14 at 18:36
  • @John: Delete the files that mention adilson and experimental. I don't remember the exact formatting of the names, so I can't give you a file name here. – saiarcot895 Aug 07 '14 at 14:28
  • well that cleared the error :) – x0x Aug 08 '14 at 09:49
  • Ok, good! Now we need to handle the question somehow - we found out what the problem is in the comment, but the question is not so clear that is is a duplicate. And then, we need the anser in the comments in a real answer, but that is useful only after the question is rewritten. And with all this, it will get closed as duplicate anyway. That is just not worth the work, we can just flag it to be closed as "very low quality" or "unclear what you're asking". But then it will stay around closed for long time and with no use. @John If you would just delete it jyourself, that would be best. – Volker Siegel Sep 20 '14 at 14:08

1 Answers1

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The OP reported in a comment that this problem was solved by instructions provided in saiarcot895's comment, which said:

@John: Delete the files that mention adilson and experimental. I don't remember the exact formatting of the names, so I can't give you a file name here.

In short, the problem here was solved by removing .list files from /etc/apt/sources.list.d.

This may be a duplicate of How can I fix a 404 Error when using a PPA or updating my package lists?, though that appears currently to be under dispute.

Community
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Eliah Kagan
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