There are several different ways to edit boot options at the boot menu (that is, the menu which appears after you boot the installation media):
The boot: prompt, accessed by pressing the Esc key anywhere in the boot menu. When using this prompt, the first option must always specify the installation program image file to be loaded. In most cases, the image can be specified using the linux keyword. After that, additional options can be specified as needed.
Pressing the Tab key at this prompt will display help in the form of usable commands where applicable. To start the installation with your options, press the Enter key. To return from the boot: prompt to the boot menu, restart the computer and boot from the installation media again.
The > prompt on BIOS-based AMD64 and Intel 64 systems, accessed by highlighting an entry in the boot menu and pressing the Tab key. Unlike the boot: prompt, this prompt allows you to edit a predefined set of boot options. For example, if you highlight the entry labeled Test this media & install Red Hat Enterprise Linux 7.0, a full set of options used by this menu entry will be displayed on the prompt, allowing you to add your own options.
Pressing Enter will start the installation using the options you specified. To cancel editing and return to the boot menu, press the Esc key at any time.
The GRUB2 menu on UEFI-based AMD64 and Intel 64 systems. If your system uses UEFI, you can edit boot options by highlighting an entry and pressing the e key. When you finish editing, press F10 or Ctrl+X to start the installation using the options you specified.
ifname=ens0:$MACADDRESS ip=$IP::$GATEWAY:$NETMASK:$HOSTNAME:ens0:none inst.ks=nfs://192.168.122.1:/home/emonge/kickstart/ks.cfg