sudo apt-get update 
Trovato:1 http://it.archive.ubuntu.com/ubuntu xenial InRelease
Trovato:2 http://it.archive.ubuntu.com/ubuntu xenial-updates InRelease         
Trovato:3 http://it.archive.ubuntu.com/ubuntu xenial-backports InRelease       
Scaricamento di:4 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial InRelease [17,6 kB]
Scaricamento di:5 http://security.ubuntu.com/ubuntu xenial-security InRelease [93,3 kB]
Scaricamento di:6 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial/main amd64 Packages [46,3 kB]
Scaricamento di:7 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial/main i386 Packages [45,3 kB]
Scaricamento di:8 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial/main Translation-en [14,5 kB]
Recuperati 217 kB in 0s (226 kB/s)                               
Lettura elenco dei pacchetti... Fatto