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[[meta copyright="Copyright © 2007 Free Software Foundation, Inc."]]
[[meta license="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled
[[GNU_Free_Documentation_License|/fdl]]."]]
Creating a bootable qemu image from a root filesystem and bootloader
1. Create a hard disk image
<pre>qemu-img create -f qcow <imagename.img> <size>G</pre>
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.
<pre>qemu -cdrom /dev/cdrom -hda <imagename.img> -boot d</pre>
3. Once system is booted use a partition editing tool (like fdisk, cfdisk, parted, gparted, qtparted ...) to partition the image.
<pre>cfdisk</pre>
create the necessary partitions (root and swap partitions boot, home ... if required)
4. Create a file syatem for the root partiotion
<pre>mke2fs /dev/hda1</pre>
5. Mount the partition
<pre>mkdir disk
mount /dev/hda1 disk</pre>
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/>
<pre>scp <user>@<host>:<path to the compressed file system> disk</pre>
7. Uncompress the files
<pre>cd disk
tar -jxvf <compressed filesystem></pre>
8. Unmount the mounted partition
<pre>cd ..
umount disk</pre>
9. power off the guest OS.
<pre>poweroff</pre>
10. To make the file syatem bootable download a grub floppy image ([[http://hurd.in/pub/Hurd/HurdOnVMware/grub.img][grub.img]])
11. Run qemu to boot into your brand new system
<pre>qemu -hda <hard disk image.img> -fda grub.img -boot a</pre>
Happy Hacking !!
Make your new system boot from the hard disk
1. Mount your grub image
<pre>mkdir floppy
mount -t ext2 -o loop grub.img floppy</pre>
2. Use previous steps 2 and 5 to boot from a liveCD and mount the partition
<pre>cd disk/boot
scp -r <user>@<host>:<path to mounted floppy image directory>/boot/grub .</pre>
3. Poweroff the guest
<pre>poweroff</pre>
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
<pre>root (hd0,0)
setup (hd0) </pre>
Now you have a bootable system image. Enjoy Maadi !!
-- PraveenA - 21 Jun 2006
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