sudo apt update -o Aquire::ForceIPv4=true
Hit:1 http://ppa.launchpad.net/noobslab/icons/ubuntu xenial InRelease          
Hit:2 http://ppa.launchpad.net/obsproject/obs-studio/ubuntu xenial InRelease   
Hit:3 http://ppa.launchpad.net/saiarcot895/flightgear/ubuntu xenial InRelease  
Hit:4 http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu xenial InRelease     
0% [Connecting to archive.ubuntu.com (2001:67c:1360:8001::17)] [Connecting to d