Rebuilding the DVD ISO for CentOS 5 or RHEL 5

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  • I found a few documents on the Internet about what I needed to do to rebuild the DVD to integrate my kickstart file. Unfortunately none of the solution had all the needed command in one place for my setup to work so here is my cookbook from the different sources.

    First I mounted the dvdrom with the CentOS DVD to /mnt/cdrom:

    mount /dev/cdrom /mnt/cdrom

    Then I copied a few files:

    • cd /tmp
    • cp -R /mnt/cdrom/isolinux ./
    • cp -R /mnt/cdrom/CentOS ./isolinux/
    • cp -R /mnt/cdrom/* ./isolinux/ [say yes to overwrite the TRANS.TBL]
    • cp -R /mnt/cdrom/.discinfo ./isolinux/
    • cp ks.cfg /tmp/isolinux/

    For my RHEL5.1 rebuild I did similar commands but the paths are a bit different:

    • cd /tmp
    • cp -R /mnt/cdrom/isolinux ./
    • cp -R /mnt/cdrom/Server ./isolinux/
    • cp -R /mnt/cdrom/VT ./isolinux/
    • cp -R /mnt/cdrom/images ./isolinux/
    • cp -R /mnt/cdrom/Cluster ./isolinux/
    • cp -R /mnt/cdrom/ClusterStorage ./isolinux/
    • cp /mnt/cdrom/* ./isolinux/ [say yes to overwrite the TRANS.TBL]
    • cp -R /mnt/cdrom/.discinfo ./isolinux/
    • cp ks.cfg /tmp/isolinux/

    I had to change permissions on 2 files:

    • chmod 664 ./isolinux/isolinux.bin
    • chmod 664 ./isolinux/isolinux.cfg

    I had to edit the isolinux.cfg (in the isolinux directory) to change a couple of lines:

    • the “default linux” line became “default ks“
    • The 2 line after “label ks” went from “append ks initrd=initrd.img” to “append ks=cdrom:/ks.cfg initrd=initrd.img“

    The isolinux.cfg file now looks like:

    default ks
prompt 1
timeout 600
display boot.msg
F1 boot.msg
F2 options.msg
F3 general.msg
F4 param.msg
F5 rescue.msg
label linux
kernel vmlinuz
append initrd=initrd.img
label text
kernel vmlinuz
append initrd=initrd.img text
label ks
kernel vmlinuz
append ks=cdrom:/ks.cfg initrd=initrd.img
label local
localboot 1
label memtest86
kernel memtest
append -

    To build the ISO (all this on one line):

    mkisofs -o centos5-dvd1.iso -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -r -R -J -V “CentOS 5.1 (CentOS) Disk1″ -A “CentOS 5.1 (CentOS) Disk1″ -p “Cinq” -T isolinux/

    For Red Hat Entreprise Linux 5.1 I had to change the label for the DVD from “CentOS 5.1 (CentOS) Disk1″ to “RHEL_5.1 x86_64 DVD” (obviously I am using the x64 version for RHEL5) so the command became:

    mkisofs -o centos5-dvd1.iso -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -r -R -J -V “RHEL_5.1 x86_64 DVD” -A “RHEL_5.1 x86_64 DVD” -p “Cinq” -T isolinux/

    Reference sites:

    Posted on April 14

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