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Some applications in Ubuntu don't update automatically, for example VirtualBox, GCC and Git.

I'm afraid of using unofficial PPAs, but I can't find PPAs from official sources.

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    I upvoted and favorited this question because it is global for PPA users. Maybe it is a start point for a program such as apt-cache search but for PPA. – Ade Malsasa Akbar Jul 27 '14 at 10:32
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For Finding PPA:


For getting Information about PPA and use, visit:

From community PPA:

Security

PPAs have not undergone the same process of validation as regular ubuntu packages. End users install PPAs at their own risk. Although each key is cryptographically signed, in order to confirm an uploader, keys are not matched to specific individuals, except via their "launchpad" accounts.

Subsequently, installing a PPA should be considered to be a low-security alternative as compared to the main repository, but marginally higher security than simply installing software at random from the internet. As part of adding a PPA, you trust the developer to not only install packages, but also to allow them to provide ongoing updates.


Following also may help you:

  • I upvoted this answer. This answer is good because it has clear pointer entences – Ade Malsasa Akbar Jul 27 '14 at 11:48
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https://launchpad.net/ seems to host all of the PPAs. You can search for it here (or here) to find various PPAs - e.g:

The problem here is finding out if the PPA is official, or just someone's personal PPA.

For the possible security concerns, you may want to read this question

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