I've gone through the trouble (after some 10 rounds I finally have something I'm happy with) and generated jigdo/template files for CentOS 5.0 iso's (CD/DVD i386/x86_64) (and CentOS 4.4 while I was at it: CD/DVD/ServerCD SRPMS/i386/x86_64). (and I started on this before the thread about creating the DVD's from the CD's started ;-) ) They are available at: http://tcs.uj.edu.pl/~buildcentos/centos-jigdo/ (I skipped the LiveCD since jigdo offers no size improvement here -- already for the ServerCD the template file is 125 MBs because of the different .img files inside the iso) These jigdo/template files should allow you to generate any of the listed cd/dvd isos from the publically available http://mirror.centos.org mirror site (which is DNS-aliased to something close to you). Jigdo will also allow using a local source of files (ie. an existing CD, etc...) You will need to install jigdo-file and jigdo-lite. It is available: - in package jigdo from dag's repository (rpmforge) for CentOS 4 (and others) - in package jigdo-file for debian/ubuntu (just apt-get it) - from the source website (both sources, and windows binaries, and statically linked linux binaries) http://atterer.net/jigdo/ Once installed usage is (...should be...) trivial: jigdo-lite --noask http://tcs.uj.edu.pl/~buildcentos/centos-jigdo/%.jigdo which will generate the requested (replace the % with what you want, see the http://tcs.uj.edu.pl/~buildcentos/centos-jigdo/ listing) iso file in the directory in which you run it. [If you have a local source of files you can skip the --noask and provide it when asked] Next step: get this included on the centos mirrors ;-) [hint hint] Afterwards: it would be nice to drop the iso files from the mirrors in their entirety and generate them on-the-fly using the JTE extensions package. Should be significant space-savings. [requires perl cgi in the hosting webserver, but should be very safe since it's all read-only access] Even later: it would be awesome if we could generate the jigdo/template during mkisofs (requires using a patched mkisofs). This would skip the slightly painful jigdo generation step (painful - because I have to download a local mirror of both the files and the CD/DVD images, much less painful to do it directly on the centos source/build system/mirrors) Both later steps are 95% there (the JTE jigit website/extensions/mkisofs patches/etc) and mostly require putting together rpms for EL4/5. (I'm going to be trying to put together a mkisofs-jte rpm which doesn't override the normal mkisofs rpm, but instead provides two files - /usr/bin/mkisofs-jte and it's manpage) This should also allow more customized images (like the rolled up updates) without increasing mirror space usage. Jigdo (combined with hardlinking identical files, which I believe is already done) should enable drastic reductions in centos HDD footprint. Comments? Cheers, Maciej Zenczykowski