While I prefer to use ISOMaster to edit ISO's, here is PMagics inhouse mkgriso Script.
#!/bin/sh # mkgriso : make isolinux iso # =========================== # Copyright 2013 Patrick J. Verner, Waupaca, WI, USA # All rights reserved. # # Redistribution and use of this script, with or without modification, is # permitted provided that the following conditions are met: # # 1. Redistributions of this script must retain the above copyright # notice, this list of conditions and the following disclaimer. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED # WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO # EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; # OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # Written by Dick Burggraaff (burdi01) # ------------------------------------------------------------------------------ # To remaster this ISO do the following: # Copy the ISO to the current directory: # # mkdir /tmp/cdrom # # mount -o loop pmagic_2015_08_12.iso /tmp/cdrom # # cp -a /tmp/cdrom . # # umount /tmp/cdrom # Apply your changes to cdrom/...... # Run this script: # # sh cdrom/mkgriso # ------------------------------------------------------------------------------ V=pmagic_2015_08_12T ; ISO=$(readlink -f $(dirname $0)/../$V.iso) [ ".$1" != "." ] && ISO="$1" # for pmagic_save_cd_session B="-b boot/syslinux/isolinux.bin -c boot/syslinux/isolinux.boot" B="$B -no-emul-boot -boot-load-size 4 -boot-info-table" if [ -x "$(which genisoimage 2> /dev/null)" ]; then M=genisoimage E="-eltorito-alt-boot -e EFI/boot/efiboot.img -no-emul-boot" else M=mkisofs E="" fi if ! $M -hide-rr-moved -l -v -d -N -R -J -V "Parted Magic" \ $B $E -o $ISO $(dirname $0) ; then exit 1 fi [ ".$E" = "." ] && echo ">>> $M does not support efi booting" echo ">>> $ISO created" exit 0