webboot & ubuntu

sudo apt install libssl-dev
sudo apt-get install build-essential

git clone --depth 1 -b v4.12.7 git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux
git clone git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/linux-firmware.git
cp config-4.12.7 linux/.config ** OR **
cd linux
 wget https://raw.githubusercontent.com/u-root/webboot/master/config-4.12.7
cp config-4.12.7 .config

make bzImage


--Make Ubuntu's kernel :
sudo apt-get install git build-essential kernel-package fakeroot libncurses5-dev libssl-dev ccache bison flex
git clone --reference linux git://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/bionic
git clone --reference linux git://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/cosmic

sudo apt-get build-dep --no-install-recommends --only-source linux
apt-get source --only-source linux

(if error, type sudo nano /etc/apt/sources.list, and delete any # you see)

sudo apt-get install linux-source
mkdir ~/src; cd ~/src
go to https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/linux-4.15.tar.xz (it will start a download)
sudo cp -R /Downloads/linux-4.15.tar.xz ~/src
cd ~/src
sudo tar -xzvf linux-4.15.tar.xz (or right click and extract)

cp -vi /boot/config-`uname -r` .config
sudo apt-get install libncurses5 libncurses5-dev

sudo make menuconfig
(I didn't change anything, just hit the down-arrow to exit and save)
grep PMEM .config

if it has any =m,
nano .config, CTRL+W (or whatever option says search for), find what said =m and change it to =y, and save.
grep PMEM .config, and make sure it looks like this:

CONFIG_X86_PMEM_LEGACY_DEVICE=y
CONFIG_X86_PMEM_LEGACY=y
CONFIG_BLK_DEV_PMEM=y
CONFIG_ARCH_HAS_PMEM_API=y

make -j8

go get github.com/u-root/webboot

cd $GOPATH/src/github.com/u-root/webboot

go run buildimage.go -u '-build=bb -files $HOME/src/linux-4.15/arch/x86/boot/bzImage:bzImage'


qemu-system-x86_64  -m 2048   -kernel linux/arch/x86/boot/bzImage   -append 'console=ttyS0 console=tty1 memmap=4G!4G'   -initrd /tmp/initramfs.linux_amd64.cpio   -device virtio-rng-pci -netdev user,id=network0 -device rtl8139,netdev=network0