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This question already has an answer here:

I read this:

There is a finite number of PPAs that a user can add (more accurately GPG Keys). If they don't need a PPA to solve the problem, don't make them use up one of their slots.

Is this true? I can't find any source. If this is true, what is the limit? I've seen the number 65k floated around but nothing concrete.

marked as duplicate by Rinzwind, Tim, fossfreedom Nov 18 '15 at 22:05

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Where did you read it? – user364819 Nov 18 '15 at 21:27
  • @ParanoidPanda on a stack exchange site which dislikes ppas. I can link, but it kind of detracts from the question. Here is is for context: meta.elementaryos.stackexchange.com/questions/147/… – Tim Nov 18 '15 at 21:27
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    I think if you assumed it would take 1/10th of a second to perform an update scan on a PPA, and you have 65k PPA's you would be pretty upset about system performance... – Charles Green Nov 18 '15 at 21:29
  • @CharlesGreen Good point. However, is there a software limit rather than a user patience limit? – Tim Nov 18 '15 at 21:30
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    askubuntu.com/questions/697799/… found it. asked 5 days ago. – Rinzwind Nov 18 '15 at 22:00
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Technically there shouldn't be anymore, according to this LP bug report a fix was released and "confirmed" for a bug in Apt/GnuPG as of 02/10/2015.

However, this bug still exists as of 15.04 (I can confirm, have had it affect both my vanilla Ubuntu 15.04 install and Ubuntu MATE 15.04 install), and thus you are, in effect, limited to 40 PPAs.

However, there is, AFAIK, no configurable limit to PPAs.

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