Bonjour, désolé de vous répondre avec ce délai, mais j'ai été très occupé durant ces dernières heures.
Voici les retours des lignes de commandes que vous m'avez indiquées.
Merci beaucoup pour votre aide !
laurent@laurent-ASUS:~$ cd /etc/apt && sudo rm -v *distUpgrade && cd /etc/apt/sources.list.d && sudo rm -v *distUpgrade && cd
[sudo] Mot de passe de laurent :
'sources.list.distUpgrade' supprimé
'otto-kesselgulasch-ubuntu-gimp-xenial.list.distUpgrade' supprimé
'skype-stable.list.distUpgrade' supprimé
laurent@laurent-ASUS:~$
laurent@laurent-ASUS:~$ sudo sed -i '/désactivé/{s/^# //;s/ # désactivé.*$//}' /etc/apt/sources.list.d/*.list && find /etc/apt -type f -name '*.list*' -exec bash -c 'echo -e "\n$1\n"; [[ $1 = *".list" ]] && nl -ba "$1"' _ '{}' \;
/etc/apt/sources.list
1 # deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial 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://fr.archive.ubuntu.com/ubuntu/ bionic main restricted
6 # deb-src http://fr.archive.ubuntu.com/ubuntu/ bionic main restricted
7
8 ## Major bug fix updates produced after the final release of the
9 ## distribution.
10 deb http://fr.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
11 # deb-src http://fr.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
12
13 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
14 ## team, and may not be under a free licence. Please satisfy yourself as to
15 ## your rights to use the software. Also, please note that software in
16 ## universe WILL NOT receive any review or updates from the Ubuntu security
17 ## team.
18 deb http://fr.archive.ubuntu.com/ubuntu/ bionic universe
19 # deb-src http://fr.archive.ubuntu.com/ubuntu/ bionic universe
20 deb http://fr.archive.ubuntu.com/ubuntu/ bionic-updates universe
21 # deb-src http://fr.archive.ubuntu.com/ubuntu/ bionic-updates universe
22
23 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
24 ## team, and may not be under a free licence. Please satisfy yourself as to
25 ## your rights to use the software. Also, please note that software in
26 ## multiverse WILL NOT receive any review or updates from the Ubuntu
27 ## security team.
28 deb http://fr.archive.ubuntu.com/ubuntu/ bionic multiverse
29 # deb-src http://fr.archive.ubuntu.com/ubuntu/ bionic multiverse
30 deb http://fr.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
31 # deb-src http://fr.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
32
33 ## N.B. software from this repository may not have been tested as
34 ## extensively as that contained in the main release, although it includes
35 ## newer versions of some applications which may provide useful features.
36 ## Also, please note that software in backports WILL NOT receive any review
37 ## or updates from the Ubuntu security team.
38 deb http://fr.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
39 # deb-src http://fr.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
40
41 ## Uncomment the following two lines to add software from Canonical's
42 ## 'partner' repository.
43 ## This software is not part of Ubuntu, but is offered by Canonical and the
44 ## respective vendors as a service to Ubuntu users.
45 deb http://archive.canonical.com/ubuntu bionic partner
46 # deb-src http://archive.canonical.com/ubuntu bionic partner
47
48 deb http://security.ubuntu.com/ubuntu bionic-security main restricted
49 # deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted
50 deb http://security.ubuntu.com/ubuntu bionic-security universe
51 # deb-src http://security.ubuntu.com/ubuntu bionic-security universe
52 deb http://security.ubuntu.com/ubuntu bionic-security multiverse
53 # deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
/etc/apt/sources.list.save
/etc/apt/sources.list.d/otto-kesselgulasch-ubuntu-gimp-xenial.list
1 deb http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic main
2 # deb-src http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu xenial main
/etc/apt/sources.list.d/skype-stable.list.save
/etc/apt/sources.list.d/otto-kesselgulasch-ubuntu-gimp-xenial.list.save
/etc/apt/sources.list.d/skype-stable.list
1 deb [arch=amd64] https://repo.skype.com/deb stable main
laurent@laurent-ASUS:~$
laurent@laurent-ASUS:~$ sudo apt clean && sudo apt update
Atteint :1 http://fr.archive.ubuntu.com/ubuntu bionic InRelease
Réception de :2 http://security.ubuntu.com/ubuntu bionic-security InRelease [88,7 kB]
Atteint :3 http://fr.archive.ubuntu.com/ubuntu bionic-updates InRelease
Réception de :4 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease [15,4 kB]
Atteint :5 http://fr.archive.ubuntu.com/ubuntu bionic-backports InRelease
Réception de :6 https://repo.skype.com/deb stable InRelease [4487 B]
Atteint :7 http://archive.canonical.com/ubuntu bionic InRelease
Réception de :8 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic/main amd64 Packages [10,2 kB]
Réception de :9 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic/main i386 Packages [10,2 kB]
Réception de :10 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic/main Translation-en [5944 B]
Réception de :11 https://repo.skype.com/deb stable/main amd64 Packages [2274 B]
Réception de :12 http://security.ubuntu.com/ubuntu bionic-security/main amd64 DEP-11 Metadata [38,8 kB]
Réception de :13 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 DEP-11 Metadata [42,0 kB]
Réception de :14 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 DEP-11 Metadata [2464 B]
220 ko réceptionnés en 1s (233 ko/s)
Lecture des listes de paquets... Fait
Construction de l'arbre des dépendances
Lecture des informations d'état... Fait
9 paquets peuvent être mis à jour. Exécutez « apt list --upgradable » pour les voir.
laurent@laurent-ASUS:~$