[Ubuntu LTSP Server with Thin
Client ]
Systems
Administration Manual
[Cloud Ubuntu Server]
Executive Sponsor – [Jijeesh]
Business Owner - [Jijeesh]
Project Manager – [Jijeesh]
Original Plan Date: [2014-04-20]
Revision Date: [Insert Date, Spelled Out]
Revision: [01]
About this Document -System Administration Manual
This guide is based on
the comprehensive LTSP documentation done by the Ubuntu Community
Ubuntu
Community Documentation - UbuntuLTSP
This guide is intended as a relatively easy step by step mostly
graphical (GUI) guide to:
- Set up a basic Ubuntu LTSP server on Ubuntu 11.04, 11.10 and 12.04
- Configure Ubuntu 32bit thin- and fat clients with internet access.
Introduction and Purpose 5
Project References 5
Glossary 5
System Application 5
System Organization 5
User and Group Accounts 5
Server Administration 6
Revision History
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Date
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Comment
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1.0
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04/22/14
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Ubuntu server with thin client
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Introduction
A System
Administration Manual serves the purpose of an Operations Manual in
distributed (client/server) applications.
Introduction and Purpose
This
section introduces and
describes the purpose of
the Systems Administration Manual, the name of the system to which it
applies, and the type of
computer operation
Project References
This
section lists, at a minimum, the User Manual, Maintenance
Manual, and other pertinent available systems documentation.
SYSTEMS ADMINISTRATION
This
section introduces the responsibilities of the System Administrator,
as discussed in the subsequent sections.
User and Group Accounts
This
section introduces topics related to system users.
Adding/Deleting Users
This
section describes procedures to create/delete user logins and
password accounts.
Setting User Permissions
This
section describes procedures to give users/restrict access to certain
files.
Adding/Deleting User Groups
This
section contains procedures to create/delete user groups.
Setting User Roles/Responsibilities
This
section describes the roles that are granted to each group or
individual user(s).
Server Administration
This
section describes procedures to setup servers, including naming
conventions and standards.
Change your available network adaptor IP to a fixed entry
Most local network already use the 192.168.0.xx range of IP
addresses, but the default install of LTSP relies on this range being
available. In this tutorial we will set up the LTSP network on
the 192.168.1.xx range.
- You also need a separate network adaptor with internet access during the install process.
- The LTSP server install wants to install it's own DHCP server, so if you have a router with it's own DHCP server it could cause conflicts if in the same network IP range.
- So what to do is change your unused LAN port's IP address to a fixed IP in another IP range. For example my setup has a router with a DHCP server running on 192.168.0.1, and provides the Internet access on the system. I changed my other LAN adaptor's IP to 192.168.1.1 , this will be used for the LTSP network.
- NOTE: For some reason the DHCP server does not want to start correctly on system startup if the network adaptor's IP is not set in the network interfaces config file. (see 1d. below)
Install the LTSP server
Open the Terminal Window and enter :
apt-get install ltsp-server-standalone openssh-server
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Edit the DHCP configuration for your LTSP server to match your chosen IP range
In this case I am planning static dhcp to avoid
dhcpd server conflict gedit
/etc/ltsp/dhcpd.conf
Open the Terminal Window and enter :
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Vim gedit
/etc/ltsp/dhcpd.conf
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authoritative;
subnet 192.168.11.0 netmask 255.255.255.0 { # range 192.168.11.20 192.168.11.250; option domain-name "example.com"; option domain-name-servers 192.168.11.1; option broadcast-address 192.168.11.255; option routers 192.168.11.1; # next-server 192.168.0.1; # get-lease-hostnames true; option subnet-mask 255.255.255.0; option root-path "/opt/ltsp/i386"; if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" { filename "/ltsp/i386/pxelinux.0"; } else { filename "/ltsp/i386/nbi.img"; } host jijeesh16 { hardware ethernet 00:16:76:87:45:01; fixed-address 192.168.11.16; } host bins62 { hardware ethernet 00:16:76:49:01:3e; fixed-address 192.168.11.62; } host biji63 { hardware ethernet 00:80:48:48:d3:59; fixed-address 192.168.11.63; }
}
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Select the network interface/s for the DHCP server
Add the network devices you would like the DHCP
server to run on. In this case we changed the value of INTERFACES
to include eth0
Open the
Terminal Window and enter :
vim /etc/default/isc-dhcp-server
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INTERFACES="eth0"
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Restart the DHCP server
Open the
Terminal Window and enter :
/etc/init.d/isc-dhcp-server restart
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Build the i386 (32bit) LTSP Thin/Fat Client
This step
builds the 32bit Thin Client Ubuntu 11.04 image needed to boot the
thin clients on the network.
This step downloads and installs all the 32bit Ubuntu client
elements. Could take a while.
Open the Terminal Window and enter :
ltsp-build-client --arch i386
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Reboot your new LTSP server to complete LTSP server install
- At this point your Ubuntu LTSP server should be up and running.
- You should be able to boot a Thin Client via the network.
Tip:
After reboot make sure that the DHCP
is running correctly. Open a Terminal Window and enter:
/etc/init.d/isc-dhcp-server status
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Install the JDK package
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update-alternatives --install "/usr/bin/java" "java"
"/usr/java/jdk1.7.0_55/bin/java" 1
update-alternatives --install "/usr/bin/javaws" "javaws"
"/usr/java/jdk1.7.0_55/bin/javaws" 1
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