Settings

DEFAULT label

Set the global default. 

If "label" points into a submenu, that menu becomes the start menu;

In other words, this directive has the same effect as both MENU DEFAULT and MENU START.

TIMEOUT 30

# 30 = 3 second

PROMPT flag_val

If flag_val is 0, display the "boot:"

prompt only if the Shift or Alt key is pressed, or Caps Lock or Scroll lock is set (this is the default).  

If flag_val is 1, always display the "boot:" prompt.

Boot Item Setting

isolinux.cfg

label Kickstart
  menu label ^Kickstart
  menu immediate
  menu default
  kernel vmlinuz
  append initrd=initrd.img inst.stage2=hd:LABEL=CentOS\x207\x20x86_64 inst.ks=cdrom:/dev/cdrom:/ks.cfg

inst.stage2=    指定欲載入之安裝程式 runtime 映像檔的位置

• Any CD/DVD drive          inst.repo=cdrom
• Specific CD/DVD drive     inst.repo=cdrom:device
• Hard Drive                     inst.repo=hd:device/path
• HTTP Server                  inst.repo=http://host/path
• HTTPS Server                inst.repo=https://host/path
• FTP Server                    inst.repo=ftp://username:password@host/path
• NFS Server                    inst.repo=nfs:[options:]server:/path

\x20 代表空格

menu label

Change the label displayed for a specific menu entry.

caret symbol (^)

The caret symbol (^) in a MENU LABEL statement defines a hotkey.

(When a hotkey is pressed, the cursor will move to the corresponding menu entry.)

If "menu immediate" is present, then when a hotkey is pressed the corresponding menu entry will be directly launched.

menu default

 * Only valid after a LABEL statement

Indicates that this entry should be the default for this particular submenu. also see the DEFAULT directive .

ISO 的 Label

append initrd=initrd.img inst.stage2=hd:LABEL=CentOS\x207\x20x86_64

每 ISO 的 LABEL 都不一樣.

i.e.

Rocky 8.4 -> Rocky_x86_64

Rocky 8.5 -> Rocky-8-5-x86_64-dvd