Sering bermasalah dengan repository pada ubuntu 16.04. Berikut cara mengatasinya:
sudo cp /etc/apt/sources.list ~/
sudo wget “http://pastebin.com/raw.php?i=uzhrtg5M” -O /etc/apt/sources.list
sudo apt-get update
sudo rm /etc/apt/sources.list.d/ubuntu-extras.list
sudo apt-get update
##Jika saat wget pastebin terdapat missing, jalankan perintah berikut:
add-apt-repository universe
##Jika diminta key masukkan script berikut:
sudo apt-key adv –keyserver keyserver.ubuntu.com –recv-keys 3B4FE6ACC0B21F32
sudo apt-key adv –keyserver keyserver.ubuntu.com –recv-keys 40976EAF437D05B5
sudo apt-key adv –keyserver keyserver.ubuntu.com –recv-keys 16126D3A3E5C1192