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第三章 Edubuntu服务器与瘦客户端安装 Chapter 3. Edubuntu Server and Thin Client Computing

原文连接：http://doc.ubuntu.com/edubuntu/edubuntu/handbook/C/server.html

当前状态：翻译 Process

第三章 Edubuntu服务器与瘦客户端安装 Chapter 3. Edubuntu Server and Thin Client Computing

Table of Contents

目录

硬件要求Hardware Requirements
LTSP瘦客户端硬件要求LTSP Thin Client hardware requirements
Edubuntu服务器要求 Edubuntu Server requirements
网络要求 Network
操作理论 Theory of operation
LTSP chroot环境 The LTSP chroot environment
瘦客户端的启动进程 The boot process of a thin client
通过网络启动瘦客户端 Network booting the thin client
自定义客户端行为 Customizing thin client behaviour
配置文件格式 Format of the lts.conf file
LDM管理器 The LDM display manager
通用的瘦客户端参数 General thin client parameters
屏幕脚本 Screen Scripts
模块和启动脚本 Modules and startup scripts
X-Windows参数 X-Windows parameters
打印机配置参数 Printer configuration parameters
键盘参数 Keyboard parameters
多服务器安装 Multiple server setup
基础安装 Infrastructure setup
会话分发 Session dispatching
网络交换 Network Swap
管理DHCP服务器 Managing DHCP
向dhcp.conf添加静态项目 Adding static entries to the dhcpd.conf
DHCP失效负载均衡 DHCP failover loadbalancing
使用Sabayon和Pessulus锁定 Lockdown with Sabayon and Pessulus
Edubuntu瘦客户端管理器 Edubuntu Thin Client Manager
使用瘦客户端管理器 Using Thin Client Manager
操作 Operations
Edubuntu服务器安全 Keeping your Edubuntu server in shape
Edubuntu服务器管理器 Edubuntu Server Management
更新您的LTSP chroot Updating your LTSP chroot
修改您LTSP服务器的IP Changing the IP of your LTSP server
备份 Backing Up
什么是需要备份的？ What needs to be backed up?

Edubuntu Server is almost the same thing as Edubuntu Workstation. It contains all the same great educational programs, and the same ease of use. The only difference is that it also installs, by default, a thin client environment.

The Edubuntu community has worked very closely with the Linux Terminal Server Project (LTSP), to come up with the next generation thin client solution for GNU/Linux. It comes automatically installed on an Edubuntu server, so you can begin setting up a thin client school lab right out of the box.

Thin client computing has been around for a long time in the UNIX world. Although the implementation has evolved quite a bit, the concept has remained the same:

  • The thin client only takes care of the basic functions like display, keyboard, mouse and sound.

  • The server does the heavy weightlifting. All the applications run on the server, and they simply display on the thin client.

Because the thin clients have a limited number of tasks to manage, the hardware for the thin client can be small and cheap. The thin clients themselves are basically maintenance free. They last longer because they have no storage with moving parts like hard disks. If they break no data is lost since nothing is stored on the client itself. Simply swap the client with another one and go back to work. If your thin client is stolen or put in the trash, no data ends up in the hands of unauthorized people.

The terminal server runs all applications and contains all the data. All the regular maintenance (software updates, administration) takes place on the terminal server. The number of thin clients that a terminal server can support is proportional to the power of the server. Because GNU/Linux in general, and Edubuntu in particular, make efficient use of resources, you can support a surprising number of thin clients from a machine which might only be considered a powerful single user system running other operating systems. Please see the section called “Edubuntu Server requirements” for more details.

In a thin client computing environment, the stability of the server is important. It's important to make sure that your server has good power management, like installing a UPS, and depending on how much availability is required, redundant power supplies may be called for. As well, users who have the resources may decide to invest in multiple disks for RAID support, and other options which may be needed in a High Availability environment. However, you certainly don't need them in all environments, and Edubuntu's high quality means that in all but the most demanding environments, this won't be needed.


翻译列表：Richard Ma

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