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For example I installed VLC from the Ubuntu Software Center would it also include VLC's PPA repository so that when my laptop would do a software update, VLC updates would automatically be included for updates? Or should I manually add VLC's repository via terminal despite installing VLC through the Software Center?

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up vote -2 down vote accepted

Typically apt does include PPA repositories if the PPA has a newer version available, and Ubuntu Software Center uses APT, so if the PPA has a newer version, it will use the PPA. If the PPA has a older version, it will use the repository with the newer version.

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Thank you, but may I know why GIMP is not updated on Ubuntu Software Center? I had to install the program via terminal to get the latest version. –  junobee Jun 24 '12 at 13:26
    
Ubuntu gets it's packages from Debian, which means all Debian packages are imported. Debian has not acknowledged a new version of GIMP nor has the Ubuntu team. I suggest opening either a bug report, or talk to developers in #ubuntu-bugs on freenode, maybe. –  Micheal Harker Jun 24 '12 at 13:30
    
Thank you very much for this. –  junobee Jun 24 '12 at 13:31
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@junobee Please realize that: (1) You have to add a PPA to your software sources before the Software Center or APT will install software from it. (2) You can file a bug to request that software, or a new version of software, needs to be packaged in Ubuntu. If you do that, read this thoroughly first, and tag your but needs-packaging. However, since gimp is imported from Debian, filing a bug in Ubuntu will probably not be effective. (3) wiki.ubuntu.com/DebianImportFreeze –  Eliah Kagan Jun 25 '12 at 7:36
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No, installing a program from the Software Center will not automatically include the PPA

If you want updated versions of e.g., VLC, that are only available in the PPAs and not in the official repositories, you will have to add the PPAs manually, regardless of whether you have already installed VLC from the Software Center or not.

Now, once you have added the PPA, Software center will use it to update those particular programs.

Warning: While the software in PPAs is often newer, it may also be unstable, partially incompatible, etc. -- remember that it has not been extensively tested by the Ubuntu team as the official versions are.

Please see these related questions for details about PPAs:

  1. What are PPAs and how do I use them?
  2. Are "PPA's" safe to add to my system, and what are some "red flags" to watch out for?
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