Secure Boot Violation” may display when Secure Boot is enabled in BIOS and attempting to boot into Ubuntu and Debian - ThinkStation - Lenovo Support CH
dpkg was interrupted, asked to disable UEFI Secure Boot - Ask Ubuntu
18.04 - Cannot install software because of UEFI Secure Boot - Ask Ubuntu
Navigating through Secure Boot deployment on Linux-based hosts
Installing VirtualBox "Your system has UEFI Secure Boot enabled." message - Ask Ubuntu
Secure boot | Ubuntu Core | Ubuntu
Ubuntu 20.04.6 LTS Released With Restored UEFI Secure Boot Support - Phoronix
Secure boot | Ubuntu Core | Ubuntu
El soporte de Secure Boot de Ubuntu no es seguro - MuyLinux