Twenty-eight, CentOS system installation CD


常见问题你会感觉 tftp timeout: 防火墙 time out script: 网关没有指定,在dhcpd.conf中 不能下载:vmlinuz和initrd程序和安装的系统版本不一致 内存必须>=2G


First, the basic outline

Fedora flow guide mounting disc

  POST -> CD MBR -> MBR work -> kernel (initrd.img) -> Work anaconda

wKiom1mzNdPRe2w-AAE58BwRa4o082.png

 

Second, the CD starts to understand key documents:

#mkdir /media/cdrom

#mount -r  /dev/media  /media/cdrom

 

A), the isolinux CAT / an isolinux.cfg  follows (variant of the grub file, another bootloader)

  b), the menu option information from the document isolinux.cfg, background loading vesamenu.c32 file and import splash.jpg

 

 Three, CentOS installer boot process

3.1、MBR :

  The first stage: boot.cat

    /isolinux/boot.cat will not be used

    512 bytes are used boot.cat

  The second stage: isolinux.bin

      Profile: isolinux.cfg

      Each corresponding menu options:

      • Load the kernel: / isolinux / vmlinuz
      • Pass parameters to the kernel: append initrd = initrd.img ...

      Loading initrd.img, the anaconda program running initrd.img

3.2, anaconda: Setup

   tui: curses based text window

   gui: the graphics window

      Anaconda default program memory is greater than 512M GUI (curses text window), unless explicitly the initrd = the initrd.img the append  text, less than 512M of curse window TUI.

 

The default start GUI Interface

If the display use the TUI interfaces:

  Method a: pass "text" to the kernel parameter to:

  Method two: boot: linux text 

Method One: After selecting a menu option, press the Tab key and enter text in the back , that is at work in the text interface

Method Two:

  This operation pressed the Esc key interface appears as shown: input isolinux.cfg rise associated command file laber call up the corresponding additional information and laber

 

 3.3, the application of the working process anaconda

The first stage: the initial configuration before installing

The second stage: the installation phase

The third stage: the first start

 wKioL1mzNlrh1Wj7AABoBJghT9w685.png

 

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Origin www.cnblogs.com/liuzhiyun/p/11455044.html