Modifikasi LiveCD

ISO image LiveCD dapat dimodifikasi.

Muat ISO image

$ mkdir /home/iso
$ mount -t iso9660 -o loop /home/IGN2009-LiveCD-GNOME-i386.ISO /home/iso

Lihat isi:

$ ls -l /home/iso
isolinux
LiveOS

Modul squashfs

Lakukan modprobe

$ (echo '#!/bin/sh'; echo 'modprobe squashfs') > /etc/sysconfig/modules/squashfs.modules
$ chmod +x /etc/sysconfig/modules/squashfs.modules

Aktifkan squashfs

$ modprobe squashfs

Pasang squashfs-tools

$ yum install squashfs-tools

Modifikasi squashfs.img

Extrak squashfs.img

Isi dari file sistem disimpan di squashfs.img. Extrak memakai perintah squashfs-root

$ unsquashfs /home/iso/LiveOS/squashfs.img

Muat ext3fs.img

Berkas /home/squashfs-root/LiveOS/ext3fs.img muat ke direktori /home/livecd-root ==

$ mkdir /home/livecd-root
$ mount -o loop,rw /home/squashfs-root/LiveOS/ext3fs.img /home/livecd-root

Lakukan perubahan

Sebelum melakukan perubahan sebaiknya menyimpan daftar paket asli

$ rpm -qa --root /home/livecd-root/ | sort > list.txt

Perubahan yang akan dilakukan misal:

• Pasang paket blender

$ yum install blender --root /home/livecd-root/

• Pasang paket gimp

$ yum  install gimp --installroot=/home/livecd-root

• Hapus ktorrent

$ yum  remove ktorrent --installroot=/home/livecd-root

• Bersihkan dan lakukan updatedb

$ yum  clean all --installroot=/home/livecd-root
$ updatedb -U /home/livecd-root

Unmount the ext3fs.img and make a new squashfs.img

$ umount /home/livecd-root $ mksquashfs squashfs-root squashfs.img

Create a folder called build for making the new iso image

$ mkdir /home/build $ rsync -av --exclude='squashfs.img' /home/iso/ /home/build $ mv /home/squashfs.img /home/build/LiveOS $ umount /home/iso

When making a new iso image the cd volume label needs to match the isolinux.cfg entry (root=CDLABEL=Fedora-8-LiveCD-KDE).

$ cd /home/build $ mkisofs -R -l -L -D -b isolinux/isolinux.bin \ > -c isolinux/boot.catalog -o \ > /home/Modified-Fedora-8-LiveCD-KDE.iso \ > -no-emul-boot -boot-load-size 4 -boot-info-table \ > -V "Fedora-8-LiveCD-KDE" .