Build Linux kernel from source

A note for building Linux kernel from source under Archlinux

---

# fetch the kernel source code and extract it
wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.12.5.tar.xz
tar Jxvf linux-3.12.5.tar.xz
cd linux-3.12.5/
 
# prepare for the compilation, this will delete all current configuration and all generated files
make mrproper
 
# copy the config from the running system
zcat /proc/config > .config
 
# configure your customized kernel
make menuconfig
 
# Go to play some games
# n for num of your process, e.g. make -j 8
make -j n
 
# install modules under /lib/modules/
sudo make modules_install
 
# prepare the new kernel under /boot/
sudo cp arch/x86_64/boot/bzImage /boot/vmlinuz-KernelName
sudo mkinitcpio -k /boot/vmlinuz-KernelName -c /etc/mkinitcpio.conf -g /boot/initramfs-KernelName.img
sudo cp System.map /boot/System.map-KernelName
 
# update grub configuration
sudo grub-mkconfig -o /boot/grub/grub.cfg