Download sources
see sources and look at details for the package
cd /tmp/
apt-get download newrelic-daemon
ar -x newrelic-daemon_6.8.0.177_amd64.deb
ls
tar xfvz control.tar.gz
tar xfvj data.tar.bz2
apt-key
Neuen Key aus untrusted Repo importieren
gpg --keyserver pgpkeys.mit.edu --recv-key 1285491434D8786F
gpg -a --export 1285491434D8786F | apt-key add -
aptitude update
gpg --list-keys
gpg --list-sigs 34D8786F
$ gpg --list-sigs 34D8786F
pub 4096R/34D8786F 2012-03-02
uid Dell Inc., PGRE 2012 (PG Release Engineering Build Group
2012) <PG_Release_Engineering@Dell.com>
sig 23B66A9D 2012-03-02 [User ID not found]
sig 3 92F0FC09 2012-03-02 [User ID not found]
sig 1019CED6 2012-03-02 [User ID not found]
sig 86A10CC0 2012-03-02 [User ID not found]
sig 3 34D8786F 2012-03-02 Dell Inc., PGRE 2012 (PG Release Engineering
Build Group 2012) <PG_Release_Engineering@Dell.com>
sub 4096R/79DF80D8 2012-03-02
sig 34D8786F 2012-03-02 Dell Inc., PGRE 2012 (PG Release Engineering
Build Group 2012) <PG_Release_Engineering@Dell.com>
Key manuell von Site herunterladen
wget http://apt.example.com/squeeze.asc
apt-key
apt-key add squeeze.asc
Clean temporary data
its a little like a soft reset
sudo apt-get clean
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get clean
sudo apt-get update