I'm going to upgrade my laptop from Dapper to Edgy very soon. One common procedure is to upgrade all packages to the latest versions before upgrading the whole distribution. Then I found something weird because I usually used graphical tools to upgrade packages but now I run apt-get as follow.

sudo apt-get update
sudo apt-get upgrade

It seems aircrack-ng for Dapper were unavailable by now. I have to comment below line.

deb http://aircrack-ng.le-vert.net/ubuntu dapper main

In addition, two repositories was unable to verify packages because there were no PGP for them. The two repositories are as follows.

# w32codecs
deb http://packages.freecontrib.org/ubuntu/plf dapper free non-free
# tor
deb http://mirror.noreply.org/pub/tor dapper main

The first one is very easy to solve. I found the instruction at the repository itself.

wget http://packages.freecontrib.org/ubuntu/plf/12B83718.gpg -O- | sudo apt-key add -

The later one is more complicate. I also found the instruction at its wiki.

gpg --keyserver subkeys.pgp.net --recv 94C09C7F
gpg --export 94C09C7F | sudo apt-key add -

Tags: dapper, ubuntu, w32codecs, tor, gpg, pgp, apt-key