"How to Customise the Ubuntu Desktop CD"
its used to replace the
steps
- 1)"Extracting the CD contents"
- 2)"Extracting the Desktop system"(Extract the SquashFS filesystem )
# you must script steps 3 - 6 [and possibly step 7)a) ] / or pause the script and continue manually! bashing
- 7)Putting the CD together
using aufs
en.wikipedia.org/wiki/Aufs
to 'mount' the iso and the filesystem.squashfs as writable
( so you need not extract them ! )
leaving you to script the (chroot) customization
and finally
- Compressing filesystem
- Recomputing MD5 sums
and Creating ISO image
for testing the scripted customization !!
# aufs - remastering - script
# from https://help.ubuntu.com/community/LiveCDCustomization
#comments
#Hi, I've created a simple script to ease remastering the Kubuntu Live CD. It uses aufs to avoid copying all the files #back and forth. Maybe it will be usefull to others too. The script must be run as root.
CD="${1:-kubuntu-9.04-desktop-i386.iso}"; shift
# exit after any error:
set -e
which mkisofs mksquashfs tempfile sed
WDIR=`mktemp -d $PWD/kubuntu-remastered.XXXXXXXXXX`
ISO="$WDIR/${CD##*/}"
ISO="${ISO%.iso}-remastered-KDM.iso"
EXIT=""
function addExit {
EXIT="$@; $EXIT"
trap "$EXIT" EXIT HUP TERM INT QUIT
}
function mnt {
local margs="$1"; shift
local mp="$WDIR/$1"
for D in "$@"; do
mkdir -v -p "$WDIR/$D"
done
mount -v $margs "$mp"
addExit "umount -v $mp"
}
# mount the CD image
mnt "-t auto $CD -o loop,ro" cd
# mount compressed filesystem
mnt "-t squashfs $WDIR/cd/casper/filesystem.squashfs -o ro,loop" sq
# create joined writable filesystem for the new CD
mnt "-t aufs -o br:$WDIR/cd-w=rw:$WDIR/cd=ro none" cd-u cd-w
# create joined writable filesystem for the new compressed squashfs filesystem
mnt "-t aufs -o br:$WDIR/sq-w=rw:$WDIR/sq=ro none" sq-u sq-w
echo ">>> Updating CD content"
(
cd sq-u
# DO YOUR CUSTOMIZATION STUFF HERE, CHROOT, MODIFY FILES, ETC.
# ...
# ...
)
echo ">>> Compressing filesystem"
mksquashfs $WDIR/sq-u/ $WDIR/cd-u/casper/filesystem.squashfs -noappend
echo ">>> Recomputing MD5 sums"
( cd $WDIR/cd-u && find . -type f -not -name md5sum.txt -not -path '*/isolinux/*' -print0 | xargs -0 -- md5sum > md5sum.txt )
echo ">>> Creating ISO image $ISO"
mkisofs \
-V "Custom KUbuntu Live CD" \
-r -cache-inodes -J -l \
-b isolinux/isolinux.bin \
-c isolinux/boot.cat \
-no-emul-boot -boot-load-size 4 -boot-info-table \
-o "$ISO" \
$WDIR/cd-u
# The trap ... callbacks will unmount everything.
#//===============================================or try the gui this (remastersys, Create a customized Ubuntu LiveCD)
also the
http://remastersys.s...e.net/tips.html has lots of tips !
and
https://wiki.ubuntu.com/BootToRAM
