Comment 20 for bug 1403982

@nio-wiklund

Hi, not sure why it didn't work for your cmdline.

If you're still interested in debugging, the option you entered is correct,
as you can see on net-retriever source code:

if db_get debian-installer/allow_unauthenticated && [ "$RET" = true ]; then
   log "Not verifying Release signature: unauthenticated mode enabled"
else

(net-retriever_1.39ubuntu1.tar.xz, file net-retriever/net-retriever, line 204)
https://launchpad.net/ubuntu/vivid/+source/net-retriever