#Locad iso in ram grub2 password#

There may be cases where you have good reasons for doing only that. To protect only the editing of GRUB menu entries and access to the console, the execution of the grub2-setpassword command is sufficient.

#Locad iso in ram grub2 password#

When a password is requested, enter the password provided at the grub2-setpassword command.When the user is requested, enter root.The system will not boot a kernel without direct user intervention from the console. # grub2-mkconfig -o /boot/grub2/grub.cfgįound linux image: /boot/vmlinuz-3.10.86_64įound initrd image: /boot/initramfs-3.10.86_64.imgįound linux image: /boot/vmlinuz-0-rescue-f9725b0c842348ce9e0bc81968cf7181įound initrd image: /boot/initramfs-0-rescue-f9725b0c842348ce9e0bc81968cf7181.imgĪll entries defined in the GRUB menu will now require a user and password to be entered at each boot. If a user has not yet been configured, use the grub2-setpassword command to provide a password for the root user: Remove -unrestricted from the main CLASS= statement in the /etc/grub.d/10_linux file. To password protect the GRUB2 bootloader: If there is a dual boot on the system, an attacker can select an operating system like DOS at boot time that ignores access controls and file permissions. Prevent access to insecure operating systems.

Prevent access to GRUB console - If an attacker manages to use GRUB console, he can change its configuration or collect information about the system by using the cat command.

Prevent Single user mode access - If an attacker can boot into single user mode, he becomes the root user.

Why protect the bootloader with a password?

Mount the file systems, including virtual file systems like /proc.

Initialize the hardware based on the arguments given to the kernel at boot time.

Systemd then places the system in the target-defined state by performing the following initialization tasks: The file defines the services to be started. usr/lib/systemd/system/multi-user.target) to determine the default target of the system. It reads the target of the /etc/systemd/system/default.target link (e.g. Systemd is the parent of all system processes. Root 1 0 0 02:10 ? 00:00:02 /usr/lib/systemd/systemd -switched-root -system -deserialize 23 The GRUB2 menu configuration settings are located under /etc/default/grub and are used to generate the grub.cfg file. The GRUB 2 configuration file is located under /boot/grub2/grub.cfg but this file should not be edited directly. GRUB2 replaces the old GRUB bootloader (also called GRUB legacy). The default bootloader for the Rocky 8 distribution is GRUB2 (GRand Unified Bootloader). The next 64 bytes contain the partition table of the disk. The MBR discovers the boot device and loads the bootloader GRUB2 into memory and transfers control to it.

The Master Boot Record is the first 512 bytes of the boot disk. It then loads the MBR (Master Boot Record). The BIOS (Basic Input/Output System) performs the POST (power on self test) to detect, test and initialize the system hardware components. The boot process includes: The BIOS startup ¶ It is important to understand the boot process of Linux in order to be able to solve problems that may occur. How Rocky Linux supports this boot via GRUB2 and systemd The different stages of the booting process Objectives : In this chapter, future Linux administrators will learn: In this chapter you will learn how the system start. Verifying DISA STIG Compliance with OpenSCAP - Part 2

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