[K12OSN] Host configutation problem on install

[Stephen Blechynden]

Hi
I hope some one can help me on what I think is a simple problem. I installed
LTSP on a Debian system via the ltspadmin application and that when well
untill I went to use apt-get to install another program and could not
connect as it would not recognise any hosts? A config file has been altered,
can anyone point me in the right direction?
Also nftp is installed but not working can anyone help?

Thanks Stephen