W: Failed to fetch http://security.debian.org/dists/wheezy/updates/Release.gpg  Could not resolve 'security.debian.org'

W: Failed to fetch http://highlab.com/~seb/linuxcnc/rtai-debs/dists/wheezy/Release.gpg  Could not resolve 'highlab.com'

W: Failed to fetch http://linuxcnc.org/dists/wheezy/Release.gpg  Could not resolve 'linuxcnc.org'

W: Some index files failed to download. They have been ignored, or old ones used instead.
empire@linuxcnc:~$