Cookbooking Ubuntu LiveCD

#!/bin/bash
DIRNAME=client
mkdir $DIRNAME
# if you don't have your own apt-cacher instance, change the mirror url on the line below
debootstrap precise $DIRNAME http://127.0.0.1:1234/apt-cacher/ubuntu
cp /etc/resolv.conf $DIRNAME/etc/resolv.conf
cp /etc/apt/sources.list $DIRNAME/etc/apt/sources.list
mount --bind /dev $DIRNAME/dev
cat > $DIRNAME/chroot.sh  <<'EOT'
    #!/bin/sh
    mount none -t proc /proc
        mount none -t sysfs /sys
        mount none -t devpts /dev/pts
        export HOME=/root
        export LC_ALL=C
    apt-get update
    apt-get install --yes dbus
    dbus-uuidgen > /var/lib/dbus/machine-id
    dpkg-divert --local --rename --add /sbin/initctl
    ln -s /bin/true /sbin/initctl
    apt-get upgrade --yes --force-yes
    apt-get install --yes --force-yes linux-image-generic openvpn casper lupin-casper discover laptop-detect os-prober iptraf
    apt-get install --yes --force-yes firefox xfdesktop4 open-vm-tools xserver-xorg xserver-xorg-video-all x11vnc rdesktop xinit xterm htop xfonts-100dpi xfonts-75dpi xfs python-software-properties vi
    apt-get install --yes --force-yes --no-install-recommends network-manager
    apt-get clean
    rm  /usr/share/initramfs-tools/scripts/casper-bottom/25configure_init
    rm  /usr/share/initramfs-tools/scripts/casper-bottom/15autologin
    rm  /usr/share/initramfs-tools/scripts/casper-bottom/25adduser
    echo "Please set passwords for root and ubuntu"
    echo "using the passwd command"
    bash -i
    rm /var/lib/dbus/machine-id
    rm /sbin/initctl
    dpkg-divert --rename --remove /sbin/initctl
        rm -rf /tmp/*
        rm /etc/resolv.conf
        umount -lf /proc
        umount -lf /sys
        umount -lf /dev/pts
EOT
chmod 755 $DIRNAME/chroot.sh
chroot $DIRNAME "/chroot.sh"
umount -lf $DIRNAME/dev
rm $DIRNAME/chroot.sh

sed '/^exec/d' $DIRNAME/etc/init/tty1.conf >$DIRNAME/etc/init/tty1.conf.tmp
cat >> $DIRNAME/etc/init/tty1.conf <<'EOT'
exec /bin/login -f root </dev/tty1 > /dev/tty1 2>&1
EOT

mkdir -p image/$DIRNAME/{casper,isolinux,install}
cp /usr/lib/syslinux/isolinux.bin image/$DIRNAME/isolinux/
cp $DIRNAME/boot/initrd.img* image/$DIRNAME/casper/initrd.img
cp $DIRNAME/boot/vmlinuz-* image/$DIRNAME/casper/vmlinuz
cat > image/$DIRNAME/isolinux/isolinux.cfg <<EOT
DEFAULT live
LABEL live
  menu label ^Start or install Ubuntu Remix
  kernel /casper/vmlinuz
  append boot=casper persistent initrd=/casper/initrd.img nomodeset
EOT

touch image/$DIRNAME/ubuntu

mkdir image/$DIRNAME/.disk
cd image/$DIRNAME/.disk
touch base_installable
echo "full_cd/single" > cd_type
echo "Ubuntu Remix" > info
echo "http//your-release-notes-url.com" > release_notes_url
cd ../../..
chroot $DIRNAME dpkg-query -W --showformat='${Package} ${Version}\n' | tee image/$DIRNAME/casper/filesystem.manifest
cp -v image/$DIRNAME/casper/filesystem.manifest image/$DIRNAME/casper/filesystem.manifest-desktop
REMOVE='ubiquity ubiquity-frontend-gtk ubiquity-frontend-kde casper lupin-casper live-initramfs user-setup discover1 xresprobe os-prober libdebian-installer4'
for i in $REMOVE
do
        sudo sed -i "/${i}/d" image/$DIRNAME/casper/filesystem.manifest-desktop
done
rm image/$DIRNAME/casper/filesystem.squashfs
mksquashfs $DIRNAME image/$DIRNAME/casper/filesystem.squashfs -e boot
(cd image/$DIRNAME && find . -type f -print0 | xargs -0 md5sum | grep -v "\./md5sum.txt" > md5sum.txt)
cd image/$DIRNAME
mkisofs -r -V "$DIRNAMENAME_boot" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o ../$DIRNAME.iso .
cd ../..