How to compile a Linux kernel
Download Ubuntu packages:
sudo apt-get install build-essential kernel-package gcc libncurses5 libncurses5-dev libqt3-mt-dev
After copying a running kernel config file from /boot directory to the file .config of the kernel source files directory, run this command to check configuration options not present the config file of the /boot directory:
make oldconfig
To configure the kernel
make menuconfig o make xconfig
To compile the kernel:
make-kpkg clean fakeroot make-kpkg --initrd --append-to-version=-rtai1 kernel_image kernel_headers modules_image
With Ubuntu 10.04 –initrd does not work, so us those commands
update-initramfs -c -k 2.6.32.11-rtai1 update-grub2
For multiprocessor compilation with bash shell:
export CONCURRENCY_LEVEL=<n>
For multiprocessor compilation with tcsh shell:
setenv CONCURRENCY_LEVEL <n>
Check those links if they exist:
arch/x86/Makefile_32.cpu link include/asm with asm-86
GRUB 2
To open GRUB2 at boot press continuously left shift key.
The configuration file of GRUB2 is: /etc/default/grub
GRUB_DEFAULT=0 Sets the default between kernel listed in /boot/grub/grub.cfg
GRUB_TIMEOUT=10 : wait 10 seconds before booting with the default kernel
Another way is to install Grub Customizer and use a graphic environment:
sudo add-apt-repository ppa:danielrichter2007/grub-customizer sudo apt-get update sudo apt-get install grub-customizer
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