Estoy intentando actualizar mi sistema usando sudo apt update, pero obtengo este resultado al intentar hacerlo:
Hit:1 https://dl.winehq.org/wine-builds/ubuntu focal InRelease
Hit:2 https://deb.debian.org/debian buster InRelease
Hit:3 https://deb.debian.org/debian-security buster/updates InRelease
Ign:4 http://ppa.launchpad.net/cybermax-dexter/sdl2-backport/ubuntu impish InRelease
Ign:6 https://storage.googleapis.com/cros-packages/91 buster InRelease
Hit:7 https://storage.googleapis.com/cros-packages/91 buster Release
Err:8 http://ppa.launchpad.net/cybermax-dexter/sdl2-backport/ubuntu impish Release
404 Not Found [IP: 91.189.95.85 80]
Ign:5 http://cdn-fastly.deb.debian.org/debian jessie InRelease
Hit:10 http://deb.i2p2.no unstable InRelease
Get:9 http://cdn-fastly.deb.debian.org/debian jessie Release [77.3 kB]
Get:11 http://cdn-fastly.deb.debian.org/debian jessie Release.gpg [1,652 B]
Ign:11 http://cdn-fastly.deb.debian.org/debian jessie Release.gpg
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/cybermax-dexter/sdl2-backport/ubuntu impish Release' does not have a Release file.
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://cdn-fastly.deb.debian.org/debian jessie Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7638D0442B90D010 NO_PUBKEY CBF8D6FD518E17E1
E: The repository 'http://http.debian.net/debian jessie Release' 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.
No sé cómo solucionar este problema, por lo que cualquier ayuda sería muy apreciada.
Respuesta1
Dado que parece que estás ejecutando Debian 10, la solución más sencilla para esto es eliminar los repositorios de Jessie:
sed -i.bak /jessie/d /etc/apt/sources.list{,.d/*.list}
Esos repositorios ya no se actualizan y hay pocas razones para utilizar algún paquete de ellos.