Table of Contents

• Title and Copyright Information
• Preface
  • Documentation License
  • Conventions
  • Documentation Accessibility
  • Access to Oracle Support for Accessibility
  • Diversity and Inclusion
• 1 About System Boot
  • About UEFI-Based Booting
  • About BIOS-Based Booting
  • About the GRUB 2 Bootloader
• 2 About Linux Kernels
  • About Kernel Modules
    • About Weak Update Modules
  • About Virtual File Systems and System Configuration
    • About the /etc/sysconfig Files
    • About the /proc Virtual File System
    • About the /sys Virtual File System
• 3 Changing Kernel Boot Parameters Before Booting
• 4 Changing GRUB 2 Default Kernel Boot Parameters
• 5 Using grubby to Manage Kernels
  • Checking Available Kernels on the System
  • Comparing the Default Kernel to the Running Kernel
  • Changing the Default Kernel
  • Changing Kernel Command Line Boot Parameters
  • Checking the Kernel Command Line Last Used to Boot The System
• 6 Managing Kernel Parameters at Runtime
  • Listing Configurable Kernel Parameters and Values
  • Updating Kernel Parameters
• 7 Managing Kernel Modules
  • Listing Information About Loaded Modules
  • Loading and Unloading Modules
  • Changing Kernel Module Parameters
  • Specifying Modules To Be Loaded at Boot Time
  • Preventing Modules From Loading at Boot Time
  • Removing Weak Update Modules
• 8 Managing Resources Using Control Groups
  • Verifying cgroups v2
  • About Kernel Resource Controllers
  • About the Control Group File System
  • About Resource Distribution Models
  • Managing cgroups v2 Using sysfs
    • Preparing the Control Group for Distribution of CPU Time
    • Setting CPU Weight to Regulate Distribution of CPU Time
• 9 Configuring the Watchdog Service
• 10 Working With Kernel Dumps
  • Kdump System Requirements
  • Kdump Memory Reservation
  • Installing Kdump
  • Configuring Kdump
    • Configuring the Kdump Output Location
    • Configuring the Default Kdump Failure State
  • Analyzing Kdump Output
  • Using Early Kdump
• 11 Oracle Linux 9 Kernel Reference
• 12 Kernel Boot Parameter Reference
  • Parameters That Control System Performance
  • Parameters That Control Kernel Panics
• 13 Modprobe Configuration Reference
• 14 sysfs Directory Reference
• 15 procfs Directory Reference