Session - 49 | RHEL 10 Booting Process Tutorial | UEFI, ESP, GRUB2, Secure Boot & Wayland Simplified

Описание: In this deep-dive session, we walk you through the Booting Process of RHEL 10, highlighting the essential steps, new features, and practical checks every sysadmin should master.

Major topics covered:

Detailed RHEL 10 UEFI Boot Flow: Trace the journey from power-on (POST), through UEFI firmware, reading boot entries, to the EFI System Partition (ESP), GRUB2 bootloader, and loading the Linux kernel and initramfs, culminating with systemd taking control and the OS starting up.

Key changes in RHEL 10’s boot process: Understand the role of GPT, how UEFI uses stored boot entries (not just the partition table), and why ESP is critical for booting.

Verifying your kernel version: Practical methods using uname -r, hostnamectl, cat /proc/version, and rpm -q kernel commands, including how to list all installed kernel versions.

Understanding and enabling Secure Boot: What Secure Boot is, why it matters for security and compliance, step-by-step guides to check UEFI mode, enable and verify Secure Boot status with mokutil, prepare your Linux distro (including custom modules and key enrollment), and important warnings to avoid boot failures.

systemd-boot vs. GRUB2: What is systemd-boot, how it integrates with UEFI and Secure Boot, how to check if it's active on your system, and directory/file structure to look for.

Exploring Immutable Image Boot Mode (bootc): What image-based/immutable OS means (read-only root, atomic updates), how to check if your system is using bootc or image mode, and implications for updates and security.

Wayland Display Protocol: What makes Wayland different from X11, benefits for performance and security, ways to determine if your graphics session is running on Wayland, and tips for forcing or disabling Wayland on GNOME.

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00:00:17 - Session Overview
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