Edit Clonezilla ISO
This is how I edit a Clonezilla ISO file to insert my own backup and restore script for a quicker process.
Mount the ISO file as a disk
sudo mount -t iso9660 -o loop clonezilla-live-2.7.1-22-amd64.iso /mnt
Now copy all its contents to a temporary directory.
mkdir /tmp/clonezilla_iso
cd /mnt
tar -cf - . | tar -xvf - -C /tmp/clonezilla_iso
Unpack the squashfs filesystem
cd /tmp
sudo unsquashfs clonezilla_iso/live/filesystem.squashfs
Chroot into squashfs and make your updates
sudo chroot squashfs-root /bin/bash
# exit
Re-pack squashfs filesystem
sudo mksquashfs squashfs-root/ clonezilla_iso/live/filesystem.squashfs -noappend -always-use-fragments
Create new ISO
-isohybrid-mbr /usr/share/syslinux/isohdpfx.bin
might be distro specific but check your package manager for the filename.
cd /tmp/clonezilla_iso
sudo xorriso -as mkisofs -R -r -J -joliet-long -l -cache-inodes \
-iso-level 3 -isohybrid-mbr /usr/share/syslinux/isohdpfx.bin \
-partition_offset 16 -A 'Clonezilla Custom' -b syslinux/isolinux.bin \
-c syslinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table \
-eltorito-alt-boot --efi-boot boot/grub/efi.img -isohybrid-gpt-basdat \
-isohybrid-apm-hfsplus ./ > /tmp/clonezilla-live-custom-amd64.iso
Last update:
October 2, 2021