This tutorial will show you how to customize and remaster your ubuntu 9.04 jaunty using a jaunty iso file.

1. Create a work directory

<code>
mkdir jaunty
</code>

2. Create the following directoires
<code>
mkdir jaunty/cdrom
mkdir jaunty/tmp
mkdir jaunty/root
</code>

3. Mount the jaunty iso image on jaunty/cdrom directory

<code>
sudo mount -o loop jaunty.iso jaunty/cdrom
</code>

4. Copy everything from the cdrom to jaunty/image directory

<code>
cp -r jaunty/cdrom jaunty/image 
</code>

5. Now the image directory has the content of your cdrom

We are going to rebuild filesystem.squashfs under jaunty/image/casper

Move the filesystem.squashfs image to jaunty/tmp directory

<code>
sudo mv jaunty/image/casper/filesystem.squashfs jaunty/tmp
</code>

6. Mount the filesystem.squashfs under jaunty/root direct

<code>
sudo mount -o loop jaunty/tmp/filesystem.squashfs jaunty/root
</code>

7. Copy the contents of fileystem.squashfs to jaunty/remaster
<code>
sudo cp -r jaunty/root jaunty/remaster
</code>

8. Copy resolv.conf and sources.list from the host system

<code>
cp /etc/resolv.conf jaunty/remaster/etc/
</code>

9. Preserve original sources.list.

<code>
sudo cp jaunty/remaster/etc/apt/soures.list jaunty/remaster/etc/apt/soures.list.backup
sudo cp /etc/apt/sources.list jaunty/remaster/etc/apt/
</code>

Make sure that sources.list points to jaunty archive

10. Now you can chroot to jaunty/remaster

<code>
chroot jaunty/remaster
</code>

11. Now run the following ( You are inside chroot )

<code>
mount /proc
mount /sys
mount -t devpts none /dev/pts
</code>

The above commands mount the respective directories inside chroot.

12. Now you can install/remove necessary packages using apt.
eg:
<code>
apt-get update
apt-get install vlc
apt-get remove gimp
</code>

You can update the platform in general by running.

<code>
apt-get update
apt-get dist-upgrade -y
</code>

13. Cleanup the unwanted files.

<code>
apt-get clean
rm -rf /tmp/*
rm /etc/resolv.conf
umount -l -f /proc
umount -l -f /sys
umount /dev/pts
</code>

14. Now replace the sources.list with the original sources.list

<code>
cp jaunty/remaster/etc/apt/sources.list.backup jaunty/remaster/etc/apt/sources.list
</code>

15. Repack squashfs:

<code>
mksquashfs remaster image/casper/filesystem.squashfs -e remaster/boot
</code>

16. Recreate filesystem.manifest & filesystem.manifest.desktop:

Run the following commands.

<code>
chroot remaster dpkg-query -W --showformat='${Package} ${Version}\n' | tee image/casper/filesystem.manifest
cp -v image/casper/filesystem.manifest{,-desktop}
REMOVE='ubiquity casper live-initramfs user-setup discover xresprobe os-prober libdebian-installer4'
for i in $REMOVE
do
sed -i "/${i}/d" image/casper/filesystem.manifest-desktop
done
</code>

17. Recreate md5sum

<code>
cd image && find . -type f -print0 | xargs -0 md5sum > md5sum.txt
</code>

18. Copy filesytem.squashfs manifest to imag dirtorey

Recreate the iso image:

<code>
mkisofs -r -V "$IMAGE_NAME" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ../ubuntu-jaunty-remix.iso .
cd ..
</code>

Now your remastered ubuntu 9.04 jaunty is achived.

Now install the image on to a hard disk or use it as a liveCD/USB environment for recovery or general use.
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You can also just use {{:howtos:reconstructor_2.9_all.deb|Reconstructor}}

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Source: http://blog.dipinkrishna.info/2009/07/customise-or-remaster-ubuntu-904-jaunty.html