Failed to fetch http://security.ubuntu.com/ubuntu/dists/dapper-security/universe/binary-i386/Packages.bz2  Sub-process bzip2 returned an error code (2)
W: GPG error: http://www.beerorkid.com dapper Release: The following signatures were invalid: BADSIG 18B52FE3521A9C7C Justin Hayes (Automatix Repository Master) <wildtangent@w1ldt4ng3nt.net>
E: Could not get lock /var/lib/dpkg/lock - open (11 Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?