[ubuntu-za] GPG error when updating

Lloyd Reijers lloyd.reijers at gmail.com
Tue May 25 10:03:39 BST 2010

On Tue, 2010-05-25 at 08:51 +0200, Quintin van Rooyen wrote:

> For the past few days I have been getting the following error when
> running sudo aptitude update:
> W: GPG error: http://ppa.launchpad.net lucid Release: The following
> signatures couldn't be verified because the public key is not
> available: NO_PUBKEY 4CE987B57DAAC99C
> We are behind a proxy, could this be proxy related?

Hi Quintin,
I'm not sure if this is a proxy related issue, but try the following:

	sudo apt-get update -o Acquire::http::No-Cache=True

- which should instruct the http apt-get request to bypass the proxy's
cache. I'm not sure if aptitude uses the same -o parameters as

You'll know soon enough if it's proxy related.


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