Merci Nany et xubu1957 pour vos réponse
Voici les retours :
cd /etc/apt/sources.list.d && sudo rm -v *xenial* ; cd
'yannubuntu-ubuntu-boot-repair-xenial.list' supprimé
'yannubuntu-ubuntu-boot-repair-xenial.list.distUpgrade' supprimé
'yannubuntu-ubuntu-boot-repair-xenial.list.save' supprimé
Et pour l'autre commande :
sudo sed -i '52,53d;/proposed/d' /etc/apt/sources.list ; find /etc/apt -type f -name '*.list*' -exec bash -c 'echo -e "\n$1\n"; [[ $1 = *".list" ]] && cat -n "$1"' _ '{}' \;
/etc/apt/sources.list.distUpgrade
/etc/apt/sources.list.save
/etc/apt/sources.list
1 # deb cdrom:[Ubuntu 14.04.3 LTS _Trusty Tahr_ - Beta amd64 (20150805)]/ trusty main restricted
2
3 # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
4 # newer versions of the distribution.
5 deb http://archive.ubuntu.com/ubuntu bionic main restricted
6 deb-src http://archive.ubuntu.com/ubuntu bionic restricted multiverse main universe #Added by software-properties
7
8 ## Major bug fix updates produced after the final release of the
9 ## distribution.
10 deb http://archive.ubuntu.com/ubuntu bionic-updates main restricted
11 deb-src http://archive.ubuntu.com/ubuntu bionic-updates restricted multiverse main universe #Added by software-properties
12
13 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
14 ## team. Also, please note that software in universe WILL NOT receive any
15 ## review or updates from the Ubuntu security team.
16 deb http://archive.ubuntu.com/ubuntu bionic universe
17 deb http://archive.ubuntu.com/ubuntu bionic-updates universe
18
19 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
20 ## team, and may not be under a free licence. Please satisfy yourself as to
21 ## your rights to use the software. Also, please note that software in
22 ## multiverse WILL NOT receive any review or updates from the Ubuntu
23 ## security team.
24 deb http://archive.ubuntu.com/ubuntu bionic multiverse
25 deb http://archive.ubuntu.com/ubuntu bionic-updates multiverse
26
27 ## N.B. software from this repository may not have been tested as
28 ## extensively as that contained in the main release, although it includes
29 ## newer versions of some applications which may provide useful features.
30 ## Also, please note that software in backports WILL NOT receive any review
31 ## or updates from the Ubuntu security team.
32 deb http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse
33 deb-src http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse #Added by software-properties
34
35 deb http://archive.ubuntu.com/ubuntu bionic-security main restricted
36 deb-src http://archive.ubuntu.com/ubuntu bionic-security restricted multiverse main universe #Added by software-properties
37 deb http://archive.ubuntu.com/ubuntu bionic-security universe
38 deb http://archive.ubuntu.com/ubuntu bionic-security multiverse
39
40 ## Uncomment the following two lines to add software from Canonical's
41 ## 'partner' repository.
42 ## This software is not part of Ubuntu, but is offered by Canonical and the
43 ## respective vendors as a service to Ubuntu users.
44 deb http://archive.canonical.com/ubuntu bionic partner
45 deb-src http://archive.canonical.com/ubuntu bionic partner
46
47
48 deb http://www-fourier.ujf-grenoble.fr/~parisse/debian/ stable main # désactivé pour la mise à niveau vers xenial
49 deb https://dl.winehq.org/wine-builds/ubuntu/ bionic main
50 deb-src https://dl.winehq.org/wine-builds/ubuntu/ bionic main
/etc/apt/sources.list.d/malteworld-ubuntu-ppa-bionic.list.save
/etc/apt/sources.list.d/geogebra.list.distUpgrade
/etc/apt/sources.list.d/google-chrome.list
1 ### THIS FILE IS AUTOMATICALLY CONFIGURED ###
2 # You may comment out this entry, but any other modifications may be lost.
3 deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main # désactivé pour la mise à niveau vers bionic
/etc/apt/sources.list.d/google-chrome.list.save
/etc/apt/sources.list.d/geogebra.list.save
/etc/apt/sources.list.d/geogebra.list
1 ### THIS FILE IS AUTOMATICALLY CONFIGURED ###
2 # You may comment out this entry, but any other modifications may be lost.
3 deb http://www.geogebra.net/linux/ stable main # désactivé pour la mise à niveau vers xenial désactivé pour la mise à niveau vers bionic
/etc/apt/sources.list.d/malteworld-ubuntu-ppa-bionic.list
1 deb http://ppa.launchpad.net/malteworld/ppa/ubuntu bionic main
2 deb-src http://ppa.launchpad.net/malteworld/ppa/ubuntu bionic main
/etc/apt/sources.list.d/google-chrome.list.distUpgrade
/etc/apt/sources.list~