Hit:1 http://archive.canonical.com/ubuntu xenial InRelease
Hit:2 http://archive.ubuntu.com/ubuntu xenial InRelease                        
Hit:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease                
Hit:4 http://ppa.launchpad.net/bluesabre/experimental/ubuntu xenial InRelease  
Hit:5 http://archive.ubuntu.com/ubuntu xenial-backports InRelease              
Hit:6 http://ppa.launchpad.net/catfish-search/ppa/ubuntu xenial InRelease      
Hit:7 http://archive.ubuntu.com/ubuntu xenial-security InRelease               
Hit:8 http://ppa.launchpad.net/flacon/ppa/ubuntu wily InRelease                
Hit:9 http://ppa.launchpad.net/me-davidsansome/clementine-dev/ubuntu xenial InRelease
Hit:10 http://ppa.launchpad.net/shimmerproject/daily/ubuntu xenial InRelease
Hit:11 http://ppa.launchpad.net/xubuntu-dev/ppa/ubuntu xenial InRelease
Hit:12 http://ppa.launchpad.net/xubuntu-dev/xubuntu-staging/ubuntu xenial InRelease
Hit:13 http://download.virtualbox.org/virtualbox/debian wily InRelease         
Reading package lists... Done                                                  
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_bluesabre_experimental_ubuntu_dists_xenial_InRelease: The repository is insufficiently signed by key 27C189A659B7207A8B426E928BEFF2033DE06C97 (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_catfish-search_ppa_ubuntu_dists_xenial_InRelease: The repository is insufficiently signed by key 0E30642DF9CC58B564A18D8C8B5AAA5A9163B46D (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_flacon_ppa_ubuntu_dists_wily_InRelease: The repository is insufficiently signed by key 0606FBEA73863686801BE20ED5790E4FF2A61FE5 (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_me-davidsansome_clementine-dev_ubuntu_dists_xenial_InRelease: The repository is insufficiently signed by key 7A467ADCBEE1FFC8CD8B784B4F172854044A3B98 (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_shimmerproject_daily_ubuntu_dists_xenial_InRelease: The repository is insufficiently signed by key 424CFC4202CEA4C3FFB06DDAB22918DB685D1580 (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_xubuntu-dev_ppa_ubuntu_dists_xenial_InRelease: The repository is insufficiently signed by key 07D44A5424C7C12A4BAB1E80EB563F93142986CE (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_xubuntu-dev_xubuntu-staging_ubuntu_dists_xenial_InRelease: The repository is insufficiently signed by key 07D44A5424C7C12A4BAB1E80EB563F93142986CE (weak digest)
W: gpgv:/var/lib/apt/lists/download.virtualbox.org_virtualbox_debian_dists_wily_InRelease: The repository is insufficiently signed by key 7B0FAB3A13B907435925D9C954422A4B98AB5139 (weak digest