e questo è il risultato delle correzioni
vincenzo@ubuntu:~$ sudo cat -n /etc/apt/sources.list
1 # deb cdrom:[Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)]/ maverick main restricted
2 deb-src
http://archive.ubuntu.com/ubuntu maverick main restricted #Added by software-properties
3 # See
http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
4 # newer versions of the distribution.
5 deb
http://it.archive.ubuntu.com/ubuntu/ maverick main restricted multiverse
6 deb-src
http://it.archive.ubuntu.com/ubuntu/ maverick restricted main universe #Added by software-properties
7 ## Major bug fix updates produced after the final release of the
8 ## distribution.
9 deb
http://it.archive.ubuntu.com/ubuntu/ maverick-updates main restricted multiverse
10 deb-src
http://it.archive.ubuntu.com/ubuntu/ maverick-updates restricted main universe #Added by software-properties
11 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
12 ## team. Also, please note that software in universe WILL NOT receive any
13 ## review or updates from the Ubuntu security team.
14 deb
http://it.archive.ubuntu.com/ubuntu/ maverick universe
15 deb
http://it.archive.ubuntu.com/ubuntu/ maverick-updates universe
16 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
17 ## team, and may not be under a free licence. Please satisfy yourself as to
18 ## your rights to use the software. Also, please note that software in
19 ## multiverse WILL NOT receive any review or updates from the Ubuntu
20 ## security team.
21 ## Uncomment the following two lines to add software from the 'backports'
22 ## repository.
23 ## N.B. software from this repository may not have been tested as
24 ## extensively as that contained in the main release, although it includes
25 ## newer versions of some applications which may provide useful features.
26 ## Also, please note that software in backports WILL NOT receive any review
27 ## or updates from the Ubuntu security team.
28 deb
http://it.archive.ubuntu.com/ubuntu/ maverick-backports main restricted universe multiverse
29 # deb-src
http://it.archive.ubuntu.com/ubuntu/ maverick-backports main restricted universe multiverse
30 ## Uncomment the following two lines to add software from Canonical's
31 ## 'partner' repository.
32 ## This software is not part of Ubuntu, but is offered by Canonical and the
33 ## respective vendors as a service to Ubuntu users.
34 deb
http://archive.canonical.com/ubuntu maverick partner
35 deb-src
http://archive.canonical.com/ubuntu maverick partner
36 ## Uncomment the following two lines to add software from Ubuntu's
37 ## 'extras' repository.
38 ## This software is not part of Ubuntu, but is offered by third-party
39 ## developers who want to ship their latest software.
40 deb
http://extras.ubuntu.com/ubuntu maverick main
41 deb-src
http://extras.ubuntu.com/ubuntu maverick main
42 deb
http://security.ubuntu.com/ubuntu maverick-security main restricted multiverse
43 deb-src
http://security.ubuntu.com/ubuntu maverick-security restricted main universe #Added by software-properties
44 deb
http://security.ubuntu.com/ubuntu maverick-security universe
45 # deb
http://download.virtualbox.org/virtualbox/debian maverick non-free
vincenzo@ubuntu:~$