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What are PPAs and how do I use them?

I always like to have my programs up to date but in ubuntu software center the software aren't always up to date. I know about repositorys and i'd like to add some so how can i find the repository of certain programs in launchpad. I'm using Ubuntu 12.04.1.

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Can you be a little bit more specific please? Name some of the programs you want to receive via a PPA. – Andre Nov 14 '12 at 16:57

marked as duplicate by Jorge Castro, Mik, Stephen Myall, devav2, ObsessiveSSOℲ Nov 14 '12 at 20:12

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You can add a PPA location with the command

sudo add-apt-repository ppa:<ppa_name>

For example sudo add-apt-repository ppa:gnome-desktop

You can find some help on Ubuntu Documentation

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Although there is no real 'root' user on Ubuntu, you have to have superuser permissions to add a PPA. On a regular system you have to do it with sudo: sudo add-apt-repository ... – Andre Nov 14 '12 at 16:54
I edited my answer to reflect that. Thanks for the informations – NorTicUs Nov 14 '12 at 16:59
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And if you're sure the PPA name is typed correctly, you can add ' -y' to the end to auto-allow the new PPA. (sudo add-apt-repository ppa:gnome-desktop -y). This makes it easier to use post-installation scripts that add multiple PPAs without user intervention. – Veazer Nov 14 '12 at 19:15

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