This project allows you to build a linux distro from scratch
we need some dependencies so install these
sudo apt get install bzip2 git vim make gcc libncurses-dev flex bison bc cpio libelf-dev libssl-dev syslinux dosfstools
now we need to clone the Linux Kernel and edit it
git clone --depth 1 https://github.com/torvalds/linux.git
now Change to the Linux directory
cd linux
now we need to edit the kernel by editing the options this will open an interactive menu
make menuconfig
make sure 64 bit kernel (NEW) is selected
then after making the menuconfigif you have any more cores than 6 than you can make it more than 6 such as i have 8 Cores
make -j 8
After the kenel finished compiling (GENTOO MOMENT) you will see a message with bZimage, make a directory named boot-files
mkdir /boot-files
then copy the bZimage to the boot-files directory
cp arch/x86/boot/bzImage /boot-files
bzImage is a file for booting the system
cd back
cd ..
now clone busybox
git clone --depth 1 https://git.busybox.net/busybox
then enter busybox directory
cd busybox
then make the menuconfig
make menuconfig
go to settings > Build static binary (no shared libs) (NEW) select it now save, the reason we made static build is because we do not want external binaries now with the amount of cores you have run make -j <cores> like for example
make -j 8
after busybox finished compiling make an initramds
mkdir /boot-files/initramfs
now run
make CONFIG_PREFIX=/boot-files/initramfs install
initramfs is the initial file system the kernel loads after booting we will put busybox over there now move to that folder
cd /boot-files/initramfs/
now create a file called init
nano init
now add these commands to init
#!/bin/sh
/bin/sh
now save it
now delete linuxrc no need for that file
rm linuxrc
now add exec permessions to init
chmod +x init
now find then pack it to a .cpio archive
find . | cpio -o -H newc > ../init.cpio
-o means create a new archive now go 1 dir back
cd ..
now the file has been created use ls to see it, but we will use a bootloader called syslinux
make the bootfile
dd if=/dev/zero of=boot bs=1M count=50
this will make a file that is 50-100 megabytes and it will filled with zeros
we will use the fat filesystem
mkfs -t fat boot
then run
syslinux boot
now make a directory called anything but for safety we will use m then mount boot to m
mkdir m
mount boot m
then copy the kernel and initramfs to the boot fs
cp bzImage init.cpio m
now unmount it
unmount m
now the boot image is ready so we will boot it up
qemu-system-x86_64 boot
syslinux will boot up and will ask what file to boot use
/bzImage -initrd=init.cpio