Linux System Management-(-CENTOS6) installation program

CentOS installation program:

Anaconda

Tui Text Installation Interface

GUI Graphical Installation Interface

CentOS Installer startup process:

CD MBR:boot.cat

Stage2:

1) isolinux/isolinux.bin (boot loader)

2) configuration file: Isolinux/isolinux.bin

3) Depending on the selected menu options:

Load kernel: Isolinuz/vmlinuz

Pass parameters to the kernel: Append initrd=initrd.img ...

4) Load the root file system and start Anaconda

#资源足够默认启动GUI接口

To specify the use of the Tui interface:

Passing the text parameter to the kernel

such as: Linux text or press TAB to print text on the Graphics menu

Note: The above content should generally be located on the boot device;

The following Anaconda and installation related packages can be placed in:

Local Disc

Local hard disk

FITP Server:yum Repository

HTTP Server

NFS Server

Manually select the installation source

Boot:linux method

Anaconda Application Work process:
Pre-installation configuration phase

The installation process uses language

Keyboard type

Installing the target storage device

Basic Storage: Local Disk

Special Equipment: ISCSI

Set host name

Configuring network Interfaces

Time

Administrator password

Setting the partitioning method and the installation location of the MBR

Create a normal user

Select the packages to install

Installation phase

Create a partition on the target disk, perform a format operation, etc.

Install the selected package

Installing bootloader

First boot

Iptables

SELinux (security-enhanced Linux, a Linux security subsystem in which the process can access only the files needed in his task)

Core Dump

Anaconda Configuration Process:

(1) Interactive configuration method:

(2) automatic configuration by reading a given configuration file in advance

The configuration options are given by specific syntax:
Kickstart file:



To install boot options:
Boot

Text: How to install texts

Method: Manually Specify the installation methods used

Network-related boot options:

Ip=ipaddr

Netmask=mask

Geteway=gm

Dbs=dns

Ifnamename:mac_addr

Options related to the remote access feature:

Vnc

Vncpassword= ' PASSWORD '

Indicate kickstart file location
ks= File Location
DVD Drive:ks=cdrom:/path/to/kickstart_file
Hard drive:ks=hd:/Disk/directory/kickstart_file
HTTP Server:ks=http://host:port/path/to/kickstart_file
FTP Server:ks=ftp://host:port/path/to/kickstart_file
HTTPS Server:ks=https://host:port/path/to/kickstart_file
Activate emergency rescue mode:
Rescue

Official document: "Installation Guide"


Kickstart file format:
Command segment: Indicates pre-installation configuration, such as installation language
Program Baotang: Indicates which package group or package is not installed to install, etc.;
%packages----Apocalypse
@group_name-Package Group
Package------Packages to install
-package-----Packages that you do not need to install
%end----------Terminator
Script segment:
%pre: Pre-installation scripts
Operating environment: Micro-Linux environment running on installation media

%pst: Post-installation script
Operating environment: installation of completed systems

Commands in the command paragraph;
Required commands
Authconfig: Authentication Mode configuration
Authconfig-usershadow--passalgo=sha512
Bootloader:bootloader installation location and related configuration
Keyboard Setting the keyboard type
Lang: Language type
Part: Creating Partitions
ROOTPW: Indicates the root password
TimeZone: Time zone

Optional commands

Network----Initial Networking configuration
Firewall---firewall configuration
SELinux----Security Subsystem
Halt-------Installation Complete shutdown
Poweroff---shutdown after completion
Rebot------Reboot after completion
Repo Extra Yum Source
Service: Start Services after installation
Text: Installation Interface
User: Create a new user after installation is complete
VNC: Set VNC function
ZEROMBR: First condition MBR
URL: Indicates the installation source

How to create a Kickstart file:
1) Direct Manual editing
2) Creation Tool available
Centos6:system-config-kickstart
Can be configured according to template

Check KS file syntax error: ksvalidator/path/to/ks.cfg


Install Linux in Isolinux via http:
Linux ip=ipaddr netmask=mask ks=http.

Linux System Management-(-CENTOS6) installation program