Après la mise à niveau de 16.04 à 18.04, j'obtiens des erreurs lorsque je lance apt-update. Voici le résultat :
Get:2 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Get:3 http://archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
Get:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:6 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Get:7 http://archive.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Err:2 http://security.ubuntu.com/ubuntu bionic-security InRelease
Unknown error executing apt-key
Err:3 http://archive.ubuntu.com/ubuntu bionic InRelease
Unknown error executing apt-key
Err:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Unknown error executing apt-key
Err:6 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Unknown error executing apt-key
Err:7 http://archive.ubuntu.com/ubuntu bionic-security InRelease
Unknown error executing apt-key
Reading package lists... Done
W: GPG error: http://security.ubuntu.com/ubuntu bionic-security InRelease: Unknown error executing apt-key
E: The repository 'http://security.ubuntu.com/ubuntu bionic-security InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic InRelease: Unknown error executing apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic-updates InRelease: Unknown error executing apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic-updates InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic-backports InRelease: Unknown error executing apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic-backports InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://archive.ubuntu.com/ubuntu bionic-security InRelease: Unknown error executing apt-key
E: The repository 'http://archive.ubuntu.com/ubuntu bionic-security InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.J'ai cherché partout et j'ai tout essayé, mais je ne peux pas résoudre ce problème. Par exemple, j'ai essayé de changer de miroir et de déplacer le fichier trusted.gpg, mais rien n'a fonctionné.
