System Diary

Solutions For The New Grub Gentoo Kernel

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    In some cases, you may get a message on your computer that gentoo is the new Grub kernel. This problem can have several causes.

    Does Gentoo use GRUB?

    By default, most Gentoo systems now use GRUB in (located in your sys-boot/grub package), which is the outright GRUB Legacy winner. Without additionalYour GRUB2 setup supports older BIOS systems (“PCs”).

    GRUB 2 (Grand unified Bootloader Version 2), sometimes even stylized as GRUB2 and commonly referred to as GRUB, is a second set of multi-boot loaders capable of upgrading kernels from various file systems on most boot process architectures. GRUB PC supports BIOS, PC EFI, IEEE firmware (open 1275) and sparc MIPS Lemote Yeeloong.

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    GRUB2 replaces the version available for the original old full grub bootloader with a separate codebase with a new shell-like syntax to improve scripting

    If migrating an old solution from grub to see grub2, GRUB2 Migration.To


    Because GRUB (grub-0 legacy.und 97) GRUB2 was put into Gentoo, both versions of grub can be installed on the same system at the same time; In addition, only one version of the experiment can be installed on the bootable master record (MBR) of the combat disk.

    It is recommended to upgrade all systems to GRUB2 as it supports the same features and Legacy.Legacy has been removed from the Gentoo ebuilds repository.


    To manage a channelfor which GRUB is installed, set the variable in the grub_platforms make.conf file. The amd64 architecture includes a standard profile that experts say will suit most systems.

    FILE /etc/portage/make.confExample of GRUB_PLATFORMS setting for EMU, EFI and PC platforms

    How do I remove old kernels from Gentoo?

    To remove old kernel sources, you can get used to the –depclean (short form -c) smart choice that appears to remove all old but unused niche vendor versions, for example. for sys-kernel/gentoo-sources. Make sure it doesn’t erase the current sources (see the How it Works article for kernel updates and how to upgrade).

    GRUB_PLATFORMS="efi-32 emu efi-64 pc"
    platform i386 ia64 mips mipsel powerful computer sparc64 x86_64
    ARC No No No Yes No No Yes no
    kernel loading No No No No 32 bit
    EPI no Yes Yes No No No No Yes
    WWU Yes Yes Yes Yes Yes Yes
    IEEE yes 1275 (open firmware) Yes No No No Yes Yes 32 bit
    Lunson No No No Yes No No No
    Multiboot Yes No No No No No 32 bit
    QEMU Yes No No No No No 32 bit
    MIPS QEMU No No Yes No No No No
    Yes No No No No No 32 bit

    Whenever the GRUB_PLATFORMS aspect values ​​are adjusted, GRUB must reappear to create the modified binary. Don't forget to use the --newuse --deep options as shown in the final section below. Amd64 Profile

    How do I change my Gentoo kernel?

    Emerge step 1: makes all new kernel sources.Correct 2: Step Install a symbolic link to the new kernel.Step iii Move: to the new kernel folder.4Step: Set up the file.Checked step: and compile run this initramfs.Step 6: Update the bootloader.

    They include support for the (U)EFI feature by default. If you are using a BIOS-based system, set the GRUB_PLATFORMS variable if you want pc to avoid unnecessary dependencies.

    Use Flags


    Additional Software

    Optionally set os-prober (provided by the sys-boot/os-prober package), which generates GRUB queries and shoe entries for other operating systems, some of whichWe need to run the grub-mkconfig command. In many cases, this GRUB allows you to automatically detect other operating systems using Windows 7, 8.10, 1, other Linux, extracts, etc.

    gentoo new kernel grub

    The optional GRUB settings (and sys-boot/os-prober) prevent the bootloader from working efficiently. only They install boot programs into the operating system. To display the bootloader on the machine itself (it is necessary for the system to select it at boot), perform additional steps, which are almost always described in the configuration section. Installation


    1. Used with the GRUB software as a secondary bootloader.
    2. Configuring the GRUB bootloader.

    gentoo new kernel grub

    Installation of grub software depends on system mode and is covered by bootloader installation. Protecting First, the bootloader configuration from autoloading.

    Main Configuration File

    Where is Gentoo kernel config?

    configuration file by visiting /usr/src/linux/. configuration This is an increasingly secure method of upgrading to a completely new configuration file that contains all of the current configuration settings needed to support the electronics while still providing bug fixes and security areas. Includes all configuration settings in a given kernel.

    Grub-mkconfig is basically a script used to create the actual Grub configuration. It uses the site programs from /etc/grub. with the d/* layout file /etc/default/grub to create new /boot/grub/grub.cfg is just a configuration file, widely distributed - grub2 is the same.

    Recommended changes? Description
    /usr/sbin/grub-mkconfig POSIX shell script No Installed in sys-boot/grub framework: 2.Run this script to generate /boot/grub/grub.cfg according to the configuration files listed below.
    /boot/grub/grub.ShellGRUB2 cfg Script No File created with grub-mkconfig. This file is defined by And grub2's built-in script interpreter, strictly supporting all POSIX commands and it can be a syntax. See the script reference at the end of the For grub manual for help creating in functions. Note that changes to some files are not saved until the next run of grub-mkconfig.
    /etc/grub.d/* POSIX seed hook scripts Maybe Everything in the /etc/grub.d/* script that gives you its runtime bits is estimated to be a sequence, and stdout will almost certainly be merged into /boot/grub/grub . (or cfg thatspecified for the file) and the -o option) of grub-mkconfig. Scripts of this type use the current system shell and can therefore use any supported format. Ideally, these should be POSIX-compliant programs, and the output script should be compatible with the grub2 interpreter. You may need to disable scripts in order to eventually add them. For example, to use menu items that cannot be generated automatically.
    /boot/grub/custom.Shell cfg GRUB2 script Maybe The bulletin /etc/grub.Nulled d/41_custom will point to this file for reading by boot if you find it exists. This file provides a place to add additional input commands and does not require a rebuild of the main Grub .cfg file.
    /etc/default/grub POSIX dedication script Yes In most cases, only the file can be directly edited. It is mainly used to assign variables using the /etc/grub in.d scripts to customize the file. See config variables or grub2 recommended link for supported variables.

    grub in generaldoes not require the administrator to manually maintain the actual configuration of boot options (as is the case with boot loaders such as GRUB Legacy and LILO). Instead, it can generate its configuration manually using the grub-mkconfig command (/boot/grub/grub.cfg). This power supply uses /etc/grub in scripts. However, the settings in /etc/default/grub.

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