I use Ubuntu Server 16.04 on VirtualBox. I was installing Geonode according to its documentation:
sudo add-apt-repository ppa:geonode/stable
sudo apt-get update
but I have this error:
E: some index files failed to download. they have been ignored or old ones used instead
I can't get the full output because I use VirtualBox but I took a screenshot:
sudo apt-get update
– heemayl Jul 03 '16 at 12:15