You can change this to whatever you like, but make sure you change the grub.cfg to match. Now make a folder under your TFTP directory called 'centos7-net'. If you are considering setting up a public mirror site for CentOS, please follow the mirror guidelines to make sure that your mirror is. The last argument to mkisofs is the name of the installation directory.Įxample for a configuration entry with automated kickstart install: EFI/BOOT/grub. The important part here that no one seems to mention anywhere is the Code: Select all inst.repo part. Starting from CentOS Stream 9, mirrors are listed in Mirrormanager so use this link instead of the list below, covering only CentOS Linux and Stream 8 CentOS welcomes new mirror sites. If you are using CentOS 7 or 8 and need help upgrading and migrating. The volume name after the -V flag must match the volume name used in EFI/BOOT/grub.cfg and isolinux/isolinux.cfg. For that reason, you can rapidly migrate any number of servers with just one command. Mkisofs -r -T -J -V "CentOS 7 x86_64" -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o centos7_customized.iso centos_netinstall ISOLINUX boot configuration is located in isolinux/isolinux.cfg Modify or add new files to the working directoryĮFI boot configuration is located in EFI/BOOT/grub.cfg.Extract ISO contents into the working directoryīsdtar -x -C centos_netinstall -f CentOS-7-x86_64-NetInstall-1804.iso.Get the CentOS ISO from a CentOS mirror wget In our example, we will use the netinstall ISO. mkisofs tool to genereate a bootable ISO image (genisoimage or cdrtools).something to extract files from an ISO image (e.g.This article contains a step-by-step guide how to customize and repackage a bootable CentOS ISO. It is possible to modify these ISO files with various types of customizations, e.g by adding additional boot menu items or an automated kickstart installation. RHEL and CentOS ship bootable CDs or DVDs in the ISO file format.
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