Fix your NO_PUBKEY PPA’s in a snap (or a script) [HOW TO]

Adding a new PPA is quite a pain, and even after you add it, still you get ugly errors complaining the apt key is missing, and signature not being verified (this also leads to an obnoxious double confirmation from the gui updater). Stuff like this:

W: GPG error: http://ppa.launchpad.net intrepid Release:
The following signatures couldn't be verified because the public key is not
available: NO_PUBKEY DAA9427DCBF475C3

Some people already got their ass bitten even here (and I’m quite happy other reader helped them faster than I could).

Well, now it’s over ! Nico has been kind enough to point out an UbuntuForums script to solve the issue once for all. Here’s the updated script.

Download the following script:

Launchpad Keys Update Script

extract the file (it should already be executable, in case of problems check it is in the properties of the file), open a terminal in the directory where you extracted the file and run

sudo ./launchpad-update

The script will fetch every PPA key you need from Launchpad and solve your update errors in one pass ! Should you have added other PPAs afterwards, simply re-run the script.

Note: it works only for Launchpad repositories !

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