entonces quería instalar una barra de acoplamiento llamada "docky". No funcionó porque tuve que ejecutar el comando sudo apt-get update, pero obtengo este resultado:
Hit:2 http://lu.archive.ubuntu.com/ubuntu disco InRelease
Hit:3 http://linux.teamviewer.com/deb stable InRelease
Hit:4 http://lu.archive.ubuntu.com/ubuntu disco-updates InRelease
Hit:5 http://security.ubuntu.com/ubuntu disco-security InRelease
Hit:6 http://lu.archive.ubuntu.com/ubuntu disco-backports InRelease
Ign:7 http://download.virtualbox.org/virtualbox/debian 19.04 InRelease
Get:8 http://download.virtualbox.org/virtualbox/debian disco InRelease [4.428 B]
Err:8 http://download.virtualbox.org/virtualbox/debian disco InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A2F683C52980AECF
Err:9 http://download.virtualbox.org/virtualbox/debian 19.04 Release
404 Not Found [IP: 92.122.252.21 80]
Reading package lists... Done
W: GPG error: http://download.virtualbox.org/virtualbox/debian disco InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A2F683C52980AECF
E: The repository 'http://download.virtualbox.org/virtualbox/debian disco 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.
E: The repository 'http://download.virtualbox.org/virtualbox/debian 19.04 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.
No sé cómo solucionar esto. ¿Alguien tuvo el mismo problema?
Respuesta1
Puede agregar la clave para el ppa de virtualbox de esta manera:
wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -
wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -
Fuente y más información enhttps://www.virtualbox.org/wiki/Linux_Downloads
Si no desea o necesita el ppa de virtualbox en su sistema, puede eliminarlo abriendo "Software y actualizaciones" y desmarcándolo en la pestaña "Otro software".