What is Linux Secure Boot?

Linux Secure Boot is a security feature designed to ensure that a computer only boots using trusted software, preventing unauthorized or malicious code from running during the system start-up process. It works by verifying the digital signatures of bootloaders, kernels, and drivers before they are executed. On systems with UEFI firmware, Secure Boot helps protect against rootkits and boot-level malware. For Linux, this often means ensuring that the Linux kernel and bootloader are signed with a trusted key. Administrators may need to enroll their own keys or use distributions that provide signed binaries compatible with Secure Boot.