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Questions and Answers
The traditional BIOS uses a disk partitioning scheme called GPT.
The traditional BIOS uses a disk partitioning scheme called GPT.
False
UEFI stands for Unified Extensible Firmware Interface.
UEFI stands for Unified Extensible Firmware Interface.
True
GRUB is a boot loader commonly used in Windows operating systems.
GRUB is a boot loader commonly used in Windows operating systems.
False
BIOS assumes the boot device starts with a record called the GPT (GUID Partition Table).
BIOS assumes the boot device starts with a record called the GPT (GUID Partition Table).
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Linux Loader (LILO) is an example of a boot loader.
Linux Loader (LILO) is an example of a boot loader.
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UEFI includes a modern disk partitioning scheme known as MBR (Master Boot Record).
UEFI includes a modern disk partitioning scheme known as MBR (Master Boot Record).
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Linux distributions commonly use a system manager daemon called systemd to streamline the boot process.
Linux distributions commonly use a system manager daemon called systemd to streamline the boot process.
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The kernel is loaded into memory and starts executing during the bootstrapping process.
The kernel is loaded into memory and starts executing during the bootstrapping process.
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Administrators cannot modify bootstrap configurations in Linux systems.
Administrators cannot modify bootstrap configurations in Linux systems.
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The boot loader in Linux systems does not pass any arguments to the kernel.
The boot loader in Linux systems does not pass any arguments to the kernel.
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System management daemons focus solely on logging processes during boot.
System management daemons focus solely on logging processes during boot.
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UEFI and BIOS are both types of boot loaders used in Linux systems.
UEFI and BIOS are both types of boot loaders used in Linux systems.
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The config file for GRUB is called grub.cfg and it is located in /boot/grub.
The config file for GRUB is called grub.cfg and it is located in /boot/grub.
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The configuration for GRUB is specified in /etc/default/grub.
The configuration for GRUB is specified in /etc/default/grub.
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After editing /etc/default/grub, you can translate your configuration into a grub.xml file by running update-grub or grub2mkconfig.
After editing /etc/default/grub, you can translate your configuration into a grub.xml file by running update-grub or grub2mkconfig.
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GRUB supports a command-line interface for editing config file entries at boot time.
GRUB supports a command-line interface for editing config file entries at boot time.
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One of the GRUB commands mentioned is 'reboot' which reboots the system.
One of the GRUB commands mentioned is 'reboot' which reboots the system.
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GRUB_TIMEOUT controls the number of seconds to display the boot menu before autoboot.
GRUB_TIMEOUT controls the number of seconds to display the boot menu before autoboot.
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Study Notes
BIOS and UEFI
- Traditional BIOS uses the GUID Partition Table (GPT) for disk partitioning.
- UEFI (Unified Extensible Firmware Interface) is a modern firmware interface that replaces BIOS.
- UEFI includes the Master Boot Record (MBR) partitioning scheme in addition to GPT.
Boot Loaders
- GRUB (GRand Unified Bootloader) is a common boot loader for Windows operating systems.
- LILO (Linux Loader) is another example of a boot loader, primarily used in Linux systems.
- UEFI and BIOS function as types of boot loaders in Linux environments.
Boot Process and System Management
- During the bootstrapping process, the kernel is loaded into memory and begins execution.
- Linux distributions streamline the boot process using systemd, a system management daemon.
- System management daemons primarily focus on logging processes during the boot sequence.
GRUB Configuration
- GRUB configuration file is named grub.cfg and is located in /boot/grub.
- Default GRUB configurations can be modified in the file /etc/default/grub.
- After editing /etc/default/grub, use update-grub or grub2mkconfig to create or update the grub.xml file.
- GRUB supports a command-line interface for on-the-fly editing of boot entries.
GRUB Commands
- The command 'reboot' is available in GRUB to restart the system.
- GRUB_TIMEOUT defines how many seconds the boot menu is displayed before automatic booting occurs.
Limitations and Permissions
- Administrators are unable to modify bootstrap configurations directly in Linux systems.
- The boot loader does not pass arguments to the kernel during the boot process.
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Description
Test your knowledge on the boot process of Linux systems, including loading the kernel, determining which kernel to boot, starting init/systemd, probing hardware, and more. Learn about BIOS vs. UEFI and the role of boot loaders like GRUB in the startup sequence.
