PXEInstallMultiDistro

An explantion of the example /var/lib/tftpboot/pxelinux.cfg/default:

• DEFAULT vesamenu.c32 — We are informing PXELINUX to load this file. We could substitute a menu entry instead, or boot a kernel and initrd.
• TIMEOUT 600 — 600 seconds will pass before action is taken on the users behalf if no keys are pressed

• ONTIMEOUT — Indicates what action is performed when the TIMEOUT expires. In the above example, we are loading the menu itemBootLocal. If after 5 minutes the user does not choose a menu item, the system will attempt to boot to a local hard disk.

• PROMPT 0 — Will allow PXELINUX to prompt us for input
• MENU INCLUDE pxelinux.cfg/pxe.conf — Load additional configuration options from another file. The can be included in the same file, however, I find it a neater look to the menu configuration to place some options in other files.
• NOESCAPE 1 — Do not allow the user to escape out of the menu system.
• MENU BEGIN — Start a new menu
• MENU TITLE — Display title for menu
• LABEL — Refer to this menu by label
• MENU LABEL — Display title for label
• TEXT HELP — Optional text displayed on screen when highlighted
• ENDTEXT — End of optional text
• MENU SEPARATOR — Inserts a blank non-selectable line
• MENU INCLUDE — Include items from another file and create a menu from them. This is used to create the sub-menus
• MENU END — End of a menu item

Example pxelinux.cfg/pxe.conf:

MENU TITLE  PXE Server
MENU BACKGROUND pxelinux.cfg/logo.png
NOESCAPE 1
ALLOWOPTIONS 1
PROMPT 0
menu width 80
menu rows 14
MENU TABMSGROW 24
MENU MARGIN 10
menu color border               30;44      #ffffffff #00000000 std

The above pxe.conf file is configuring

1. The colors used
2. The width
3. The number of items displayed
4. The backgroud image

https://help.ubuntu.com/community/PXEInstallMultiDistro