6.5.1

Table Of Contents
2 Mount the ISO image in a folder:
mount -o loop VMware-VMvisor-Installer-6.x.x-XXXXXX.x86_64.iso /esxi_cdrom_mount
XXXXXX is the ESXi build number for the version that you are installing or upgrading to.
3 Copy the contents of cdrom to another folder:
cp -r /esxi_cdrom_mount /esxi_cdrom
4 Copy the kickstart file to /esxi_cdrom.
cp ks_cust.cfg /esxi_cdrom
5 (Optional) Modify the boot.cfg file to specify the location of the installation or upgrade script by
using the kernelopt option.
You must use uppercase characters to provide the path of the script, for example,
kernelopt=runweasel ks=cdrom:/KS_CUST.CFG
The installation or upgrade becomes completely automatic, without the need to specify the kickstart
file during the installation or upgrade.
6 Recreate the ISO image using the mkisofs or the genisoimage command.
Command Syntax
mkisofs mkisofs -relaxed-filenames -J -R -o custom_esxi.iso -b
isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-
info-table -eltorito-alt-boot -eltorito-platform efi -b
efiboot.img -no-emul-boot /esxi_cdrom
genisoimage genisoimage -relaxed-filenames -J -R -o custom_esxi.iso -b
isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-
info-table -eltorito-alt-boot -e efiboot.img -no-emul-
boot /esxi_cdrom
You can use this ISO image for regular boot or UEFI secure boot.
The ISO image includes your custom installation or upgrade script.
What to do next
Install ESXi from the ISO image.
PXE Booting the ESXi Installer
You can use the preboot execution environment (PXE) to boot a host. Starting with vSphere 6.0, you can
PXE boot the ESXi installer from a network interface on hosts with legacy BIOS or using UEFI.
ESXi is distributed in an ISO format that is designed to install to flash memory or to a local hard drive. You
can extract the files and boot by using PXE.
PXE uses Dynamic Host Configuration Protocol (DHCP) and Trivial File Transfer Protocol (TFTP) to boot
an operating system over a network.
vSphere Installation and Setup
VMware, Inc. 37