W: Impossibile recuperare mirror://mirrors.ubuntu.com/mirrors.txt/dists/quantal-security/multiverse/binary-i386/Packages  404  Not Found [Mirror: http://ubuntu.fastbull.org/ubuntu/]

W: Impossibile recuperare mirror://mirrors.ubuntu.com/mirrors.txt/dists/quantal-proposed/restricted/binary-i386/Packages  404  Not Found [Mirror: http://ubuntu.fastbull.org/ubuntu/]

W: Impossibile recuperare mirror://mirrors.ubuntu.com/mirrors.txt/dists/quantal-proposed/main/binary-i386/Packages  404  Not Found [Mirror: http://ubuntu.fastbull.org/ubuntu/]

W: Impossibile recuperare mirror://mirrors.ubuntu.com/mirrors.txt/dists/quantal-proposed/multiverse/binary-i386/Packages  404  Not Found [Mirror: http://ubuntu.fastbull.org/ubuntu/]

W: Impossibile recuperare mirror://mirrors.ubuntu.com/mirrors.txt/dists/quantal-proposed/universe/binary-i386/Packages  404  Not Found [Mirror: http://ubuntu.fastbull.org/ubuntu/]