Can I create bootable .iso file after kernel compilation for the customized kernel in Ubuntu

Question

Is it possible to create ISO Image of our current running operating system of Ubuntu? And my goal is to compile new kernel and make an ISO file.

Answer 1

mkdir -p test/boot/grub
nano test/boot/grub/grub.cfg

in grub.cfg:

menuentry "myos" {
    linux /boot/bzImage
    initrd /boot/custom-initramfs.cpio.gz
}

save and close.

custom-initramfs.cpio.gz: mk.sh

rm -r /usr/src/initramfs
mkdir -p /usr/src/initramfs/bin
mkdir -p /usr/src/initramfs/dev
mkdir -p /usr/src/initramfs/etc
mkdir -p /usr/src/initramfs/etc/network
mkdir -p /usr/src/initramfs/lib
mkdir -p /usr/src/initramfs/lib64
mkdir -p /usr/src/initramfs/mnt/root
mkdir -p /usr/src/initramfs/proc
mkdir -p /usr/src/initramfs/root
mkdir -p /usr/src/initramfs/sbin
mkdir -p /usr/src/initramfs/sys
mkdir -p /usr/src/initramfs/sys/class/net
gcc -pthread -Wall -static arp.c -o /usr/src/initramfs/init
sudo cp -a /dev/null /usr/src/initramfs/dev/
sudo cp -a /dev/console /usr/src/initramfs/dev/
sudo cp -a /dev/tty /usr/src/initramfs/dev/
sudo cp -a interfaces /usr/src/initramfs/etc/network/
sudo cp -a /sbin/ip /usr/src/initramfs/sbin/
sudo cp -a /sbin/ifconfig /usr/src/initramfs/sbin/
sudo cp -a /sbin/route /usr/src/initramfs/sbin/
sudo cp -a /sbin/dhclient /usr/src/initramfs/sbin/
sudo cp -a /sbin/dhclient-script /usr/src/initramfs/sbin/
sudo cp -a /bin/busybox /usr/src/initramfs/bin/
sudo cp -a /bin/grep /usr/src/initramfs/bin/
chmod +x /usr/src/initramfs/init
cd /usr/src/initramfs
find . -print0 | cpio --null -ov --format=newc | gzip -9 > /home/mahdi/Desktop/test/boot/custom-initramfs.cpio.gz

bzImage : after make linux kernel.
goto linux source downloaded
example location: /linux-stable/arch/x86/boot.
next step:

sudo cp -a bzImage test/boot/
grub-mkrescue -o myos.iso test