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Creating a bootable qemu image from a root filesystem and bootloader
1. Create a hard disk image
qemu-img create -f qcow <imagename.img> <size>G
2. Use a live CD (better to have a lighter OS like system rescue CD to make the
process faster) and the image created to boot.
qemu -cdrom /dev/cdrom -hda <imagename.img> -boot d
3. Once system is booted use a partition editing tool (like fdisk, cfdisk,
parted, gparted, qtparted ...) to partition the image.
cfdisk
create the necessary partitions (root and swap partitions boot, home ... if
required)
4. Create a file syatem for the root partiotion
mke2fs /dev/hda1
5. Mount the partition
mkdir disk
mount /dev/hda1 disk
6. Copy the file system from the host machine to the mounted directory (use a
compressed file system to make the copying faster)
Grab the GNU spapshot from ams' site
<http://www.update.uu.se/~ams/home/slask/GNU/>
scp <user>@<host>:<path to the compressed file system> disk
7. Uncompress the files
cd disk
tar -jxvf <compressed filesystem>
8. Unmount the mounted partition
cd ..
umount disk
9. power off the guest OS.
poweroff
10. To make the file syatem bootable download a grub floppy image
<http://hurd.in/pub/Hurd/HurdOnVMware/grub.img>
11. Run qemu to boot into your brand new system
qemu -hda <hard disk image.img> -fda grub.img -boot a
Happy Hacking !!
Make your new system boot from the hard disk
1. Mount your grub image
mkdir floppy
mount -t ext2 -o loop grub.img floppy
2. Use previous steps 2 and 5 to boot from a liveCD and mount the partition
cd disk/boot
scp -r <user>@<host>:<path to mounted floppy image directory>/boot/grub
3. Poweroff the guest
poweroff
4. Boot new system using floppy image previous step 11
use install to hard disk option if you used the above grub image
or go to grub command line and type
root (hd0,0)
setup (hd0)
Now you have a bootable system image. Enjoy Maadi !!
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