Shulou(Shulou.com)06/01 Report--

This article mainly introduces "the steps of Linux automatic installation operation". In the daily operation, I believe many people have doubts about the steps of Linux automatic installation operation. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "Linux automatic installation operation". Next, please follow the editor to study!

Principle:

Use the CD to install the linux system process:

The first step is POST self-test

The second step, MBR boot, the GRUB used here is the grub.conf in the isolinux/ folder in CDROM.

The third step is to launch a selection menu with options for installation, upgrade, repair, and so on, which is started by isolinux.bin.

Step 4, vmlinuz (initrd) mounts the root file system.

Step 5, launch the anaconda installation interface. And anaconda

Detailed analysis:

In the second step, the boot content in step 3 is defined in the grub.conf menu.

So the display here can be customized.

[root@CentOS6 cdrom] # cat isolinux/grub.conf

# debug-graphics

Default=0

Splashimage=@SPLASHPATH@

Timeout 5

Hiddenmenu

Title @ PRODUCT@ @ VERSION@

Kernel @ KERNELPATH@

Initrd @ INITRDPATH@

Title Install system with basic video driver

Kernel @ KERNELPATH@ xdriver=vesa nomodeset askmethod

Initrd @ INITRDPATH@

Title rescue

Kernel @ KERNELPATH@ rescue askmethod

Initrd @ INITRDPATH@

The third step is to enter the startup interface, where various display contents of the startup interface are defined.

It is executed by isolinux.bin and the configuration file provided by isolinux.cfg.

Display boot.msg

Reference boot.msg, whose configuration file is boot.cfg

Menu background splash.jpg

Menu title Welcome to CentOS 6.4! What is shown at the top

Menu color border 0 # ffffffff # 00000000 defines the color display of the interface

Menu color sel 7 # ffffffff # ff000000

Define option

Label linux

Menu label ^ Install or upgrade an existing system

Menu default

Kernel vmlinuz

Append initrd=initrd.img

Label vesa

Menu label Install system with ^ basic video driver

Kernel vmlinuz

Append initrd=initrd.img xdriver=vesa nomodeset

Label rescue

Menu label ^ Rescue installed system

Kernel vmlinuz

Append initrd=initrd.img rescue

Label local

Menu label Boot from ^ local drive

Localboot 0xffff

Label memtest86

Menu label ^ Memory test

Kernel memtest

Append-

Step 5, when you really enter the installation, you need to load the Packages/anaconda-VERSION.rpm file

Anaconda program can be installed in graphic and character mode, but in these two ways

You can also choose interactive installation or question-and-answer automatic installation.

Anaconda installation details:

The configuration file that is automatically installed is kickstart. Kickstart can be written manually, generated in text, or

Generated graphically. (the ks.cfg file will generate the anaconda.cfg detailed configuration in the root home directory after the installation is complete)

Here are the steps for drawing generation:

1, install system-config-kickstart

Yum install system-config-kickstart

2, start system-config-kickstart

System-config-kickstart &

3, configure kickstart

Basic Configuration:

Encrypt root password represents the password string that encrypts the root

Target Architecture: presentation platform

The action after Reboot system after installation installation is reboot, which needs to be checked.

Perform installation in text text mode (grphical is default)

The installation interface uses a graphical interface by default, so this needs to be checked.

Perform installlation in interactive mode uses interactive mode and does not check.

Install Method: installation sourc

HTTP Server: IP of the installation source

HTTP Directory: directory

Boot Loader Options: boot option

Install new bootloader installs the new bootloader, using the old one below.

Whether Use GRUB password:GRUB should be encrypted or not.

Install boot loader on Master Boot Record (MBR)

Load bootloader into MBR

Install boot loasder on first sector of the boot partition

Load bootloader into a partition and boot.

Kernel parameters:crashkernel=auto rhgb quiet uses silent mode.

Partition Information definition Partition

Network Configuration network configuration

Authentication authentication. Default sha512 is OK.

Pre

Post does not need to specify #! / bin/bash

4. Save the kickstart configuration file.

The default save name of the file is ks.cfg

5. Check the ks.cfg configuration file for errors.

# ksvalidator 2ks.cfg

Detailed description of kscfg configuration file:

Command segment:

# platform=x86, AMD64, or Intel EM64T

# version=DEVEL

# Firewall configuration

Firewall-- disabled disables firewall

# Install OS instead of upgrade

The default action of install is to install

# Use network installation

Url-url= "ftp://1.0.0.12/centos/" uses the FTP installation source

Repo-name= "CentOS"-baseurl= "ftp://1.0.0.12/centos"

# Root password

Rootpw-- iscrypted $1 $dpCtQEn6 $pC3UGFPZEJJ5nVftiaScq0

# System authorization information

Auth-useshadow-passalgo=sha512

# Use text mode install

Text uses text installation

# System keyboard

Keyboard us uses American English keyboard

# System language

Lang zh_CN sets the default language

# SELinux configuration

Selinux-- disabled disables SELINUX

# Do not configure the X Window System

Skipx

# Installation logging level

Logging-level=info

# Reboot after installation

Actions when reboot installation is complete

# System timezone

Timezone Asia/Shanghai

# Network information

Network-bootproto=static-device=eth0-ip=1.0.0.7-netmask=255.0.0.0-onboot=on

# System bootloader configuration

Bootloader-append= "crashkernel=auto rhgb quiet"-location=mbr-driveorder= "sda"

# Clear the Master Boot Record

Zerombr

# Partition clearing information

Clearpart-- all-- initlabel clear the disk partition

# Disk partitioning information disk partitions

Part / boot-asprimary-fstype= "ext4"-ondisk=sda-size=100

Part /-asprimary-- fstype= "ext4"-- ondisk=sda-- size=20480

Part swap-asprimary-fstype= "swap"-ondisk=sda-size=500

Script paragraph:

% post

Touch / tmp/abc.txt

% end

Software package segment:

% packages

@ base

@ basic-desktop

@ chinese-support

@ core

@ debugging

@ desktop-debugging

@ desktop-platform

@ desktop-platform-devel

@ development

@ directory-client

@ fonts

The choice after booting using the boot CD:

Click the "ESC" key twice to enter command line mode, and then

Linux ip=1.0.0.7 netmask=255.0.0.0 ks= ftp://1.0.0.12/pub/ks.cfg

Ftp installation source automatic installation of linux detailed steps:

1. Make a boot CD:

# mount / dev/cdrom / media/cdrom/

# mkdir / root/myboot

# cp / media/cdrom/isolinux/ / root/myboot/isolinux

# cd / root/myboot/isolinux

# chmod + w. / *

# chmod + x vmlinuz

# mkisofs-R-J-T-v-no-emul-boot-boot-load-size 4-boot-info-table-V "MageEdu Testing Image" (- V with CD label)-b isolinux/isolinux.bin (specify the location of the isolinux.bin)-c isolinux/boot.cat (specify the location of the boot.cat)-o / tmp/boot.iso (specify the output location) / root/myboot/ (specify the input source)

2. Make ftp installation source

# yum install vsfptd

# service vsftpd start

# mkdir / var/ftp/CentOS

# mount / media/cdrom / var/ftp/CentOS

3. Put the finished ks.cfg file into the ftp directory

# cp / root/ks.cfg / var/ftp/pub

4, mount the previous boot.iso to the optical drive of the target host, start the "ESC" key twice, and then type:

Linux ip=1.0.0.7 netmask=255.0.0.0 ks= ftp://1.0.0.12/pub/ks.cfg

5, automatic installation start

At this point, the study on the "steps for automatic installation of Linux" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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