Sometimes I install good guy PPAs because someone on askubuntu says to use add-apt-repository . Later I wonder, where have they gone?

Where can I find a list of Personal Package Archives that are trusted? Shell solutions preferred, but GUI solutions still useful.

I found /var/lib/apt/lists , which is a start .

See also related , what are the security risks in leaving trusted PPAs in place ?

3 Answers 3


In old Ubuntu versions, they were all in /etc/apt/sources.list file.

In recent Ubuntu, system repositories are y in /etc/apt/sources.list file and user installed PPA are inside the /etc/apt/sources.list.d directory


I use Synaptic which you can install with:

sudo apt-get install synaptic

If you click on Origins on the left side of the Synaptic Window, the PPAs that are currently installed on your system, as well as their sources are generated between the "Reload" tile, and the "Sections" button.

You can choose to view "All" at the same time, which generates a list in the box to the right, or browse each source independently to view which packages are included in each respective PPA. (As well as which version is installed, what the latest version available is, and a description of each package.)

As for whether or not the PPA is trusted seems to be based on the user. I tend to search around to determine how many complaints a particular PPA has, as well as reviews on compatibility; or whether or not the package has been added officially.

More information pertaining to repositories, as well as various labels given to them, can be found here:


And another question on AskUbuntu, offers a more colloquial explanation here:

Are PPA's safe to add to my system and what are some "red flags" to watch out for?


If you want a GUI to manage PPAs, there is Y PPA Manager.

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