AnshulYbd/setup_guide_qemu_armhf_build.txt

## setup_guide_qemu_armhf_build.txt
Install Qemu on windows
https://qemu.weilnetz.de/w64/qemu-w64-setup-20221230.exe

create empty place holder file 30Gigs
qemu-img create -f qcow2 ubuntu-bdg.img  30G

download cd boot loaders
mkdir netboot
cd netboot
wget -r -nH -nd -np -R "index.html*" --quiet http://ports.ubuntu.com/ubuntu-ports/dists/xenial/main/installer-armhf/current/images/generic-lpae/netboot/

Run install and create file system
qemu-system-arm -M virt -m 1024   -kernel netboot/vmlinuz   -initrd netboot/initrd.gz   -drive if=none,file=ubuntu-bdg.img,format=qcow2,id=hd   -device virtio-blk-device,drive=hd   -netdev user,id=mynet   -device virtio-net-device,netdev=mynet   -nographic -no-reboot

extract bootable image initrd and vmlinuz to somefolder say boot
qemu-img convert -f qcow2 -O raw ubuntu.img ubuntu-raw.img
sudo losetup /dev/loop0 ubuntu-raw.img
OFFSET=$(($(sudo fdisk -l /dev/loop0 |grep /dev/loop0p1 |awk '{print $3}')*512))
##OFFSET == 1048576

sudo mount -o loop,offset=$OFFSET /dev/loop0 /mnt
Create a new directory boot for the new kernel and initrd files and copy them into it:

mkdir boot
cp /mnt/initrd.img-4.4.0-210-generic-lpae boot
cp /mnt/vmlinuz-4.4.0-210-generic-lpae boot
Cleanup:

sudo umount /mnt
sudo losetup -d /dev/loop0
rm ubuntu-raw.img


Boot the image pointing to the extracted boot files, using below command.
qemu-system-arm -M virt -m 1024 -kernel ./boot/vmlinuz-4.4.0-210-generic-lpae   -initrd ./boot/initrd.img-4.4.0-210-generic-lpae   -append "root=/dev/vda2 rootfstype=ext4" -drive if=none,file=ubuntu-bdg.qcow2,format=qcow2,id=hd -device virtio-blk-device,drive=hd -netdev user,id=mynet,hostfwd=tcp::60022-:22 -device virtio-net-device,netdev=mynet -nographic

## Ssh from host / outside to guest qemu
root@birddog-49357:/tmp# ssh -p61022 master@192.168.208.52

## Ssh from guest Qemu to host/linux outside
master@ub1604-armhf:~$ ssh -p9031 root@192.168.208.51
or
master@ub1604-armhf:~$ ssh root@192.168.208.51 -p 9031


cmd file can run the attach image qcow2
	Install Qemu on windows
	https://qemu.weilnetz.de/w64/qemu-w64-setup-20221230.exe

	create empty place holder file 30Gigs
	qemu-img create -f qcow2 ubuntu-bdg.img 30G

	download cd boot loaders
	mkdir netboot
	cd netboot
	wget -r -nH -nd -np -R "index.html*" --quiet http://ports.ubuntu.com/ubuntu-ports/dists/xenial/main/installer-armhf/current/images/generic-lpae/netboot/

	Run install and create file system
	qemu-system-arm -M virt -m 1024 -kernel netboot/vmlinuz -initrd netboot/initrd.gz -drive if=none,file=ubuntu-bdg.img,format=qcow2,id=hd -device virtio-blk-device,drive=hd -netdev user,id=mynet -device virtio-net-device,netdev=mynet -nographic -no-reboot

	extract bootable image initrd and vmlinuz to somefolder say boot
	qemu-img convert -f qcow2 -O raw ubuntu.img ubuntu-raw.img
	sudo losetup /dev/loop0 ubuntu-raw.img
	OFFSET=$(($(sudo fdisk -l /dev/loop0 \|grep /dev/loop0p1 \|awk '{print $3}')*512))
	##OFFSET == 1048576

	sudo mount -o loop,offset=$OFFSET /dev/loop0 /mnt
	Create a new directory boot for the new kernel and initrd files and copy them into it:

	mkdir boot
	cp /mnt/initrd.img-4.4.0-210-generic-lpae boot
	cp /mnt/vmlinuz-4.4.0-210-generic-lpae boot
	Cleanup:

	sudo umount /mnt
	sudo losetup -d /dev/loop0
	rm ubuntu-raw.img


	Boot the image pointing to the extracted boot files, using below command.
	qemu-system-arm -M virt -m 1024 -kernel ./boot/vmlinuz-4.4.0-210-generic-lpae -initrd ./boot/initrd.img-4.4.0-210-generic-lpae -append "root=/dev/vda2 rootfstype=ext4" -drive if=none,file=ubuntu-bdg.qcow2,format=qcow2,id=hd -device virtio-blk-device,drive=hd -netdev user,id=mynet,hostfwd=tcp::60022-:22 -device virtio-net-device,netdev=mynet -nographic

	## Ssh from host / outside to guest qemu
	root@birddog-49357:/tmp# ssh -p61022 master@192.168.208.52

	## Ssh from guest Qemu to host/linux outside
	master@ub1604-armhf:~$ ssh -p9031 root@192.168.208.51
	or
	master@ub1604-armhf:~$ ssh root@192.168.208.51 -p 9031



	cmd file can run the attach image qcow2