Logithèque ubuntu ne fonctionne plus

lafosseg@201100572:~$ cat -n /etc/apt/sources.list
1 #
2
3 # deb cdrom:[Ubuntu 11.04 _Natty Narwhal_ - Release amd64 (20110426)]/ natty main restricted
4
5 # deb cdrom:[Ubuntu 11.04 _Natty Narwhal_ - Release amd64 (20110426)]/ natty main restricted
6
7 deb http://security.ubuntu.com/ubuntu/ oneiric-security main
8 deb-src http://security.ubuntu.com/ubuntu/ oneiric-security main
9 deb http://security.ubuntu.com/ubuntu/ oneiric-security universe
10 deb-src http://security.ubuntu.com/ubuntu/ oneiric-security universe
11 deb http://security.ubuntu.com/ubuntu/ oneiric-security multiverse
12 deb-src http://security.ubuntu.com/ubuntu/ oneiric-security multiverse
13
14 ## Uncomment the following two lines to add software from Canonical's
15 ## 'partner' repository.
16 ## This software is not part of Ubuntu, but is offered by Canonical and the
17 ## respective vendors as a service to Ubuntu users.
18 # deb http://archive.canonical.com/ubuntu/ natty partner
19 # deb-src http://archive.canonical.com/ubuntu/ natty partner
20
21 ## Uncomment the following two lines to add software from Ubuntu's
22 ## 'extras' repository.
23 ## This software is not part of Ubuntu, but is offered by third-party
24 ## developers who want to ship their latest software.
25 # deb http://extras.ubuntu.com/ubuntu/ natty main
26 deb http://archive.ubuntu.com/ubuntu/ oneiric multiverse universe main
27 # deb-src http://extras.ubuntu.com/ubuntu/ natty main
28 28119604
29 28119604
30 k,l
31 sudo tee -a /etc/apt/sources.list
32
33
34 deb http://archive.ubuntu.com/ubuntu/ oneiric-updates universe main multiverse

Elle est là ton erreur :

28 28119604
29 28119604
30 k,l
31 sudo tee -a /etc/apt/sources.list

Il suffit de supprimer ces quatre lignes et tout rentrera dans l'ordre.

comment??

On va faire super court.
Ouvre un terminal et tape :

sudo sed -i".bak" '28,31d' /etc/apt/sources.list

merci