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This article is for Ubuntu Dapper Drake, see Edgy/HOWTO: Install MueKow on Ubuntu for Ubuntu Edgy Eft.

Contents 1 Introduction 2 Install LTSP Server 3 Update MueKow 4 Setup SSH 5 Configure LTSP Clients

Introduction

MueKow is a new concept LTSP client that on Ubuntu uses Ubuntu's own package system to build the client image, previously custom builds of all the components were used.

• This article assumes the Ubuntu server has already been installed and configured appropriately.
• With Ubuntu Dapper the ltsp-build-client is Ubuntu themed but supports connection to all versions of Ubuntu, Kubuntu, and Xubuntu. This will be resolved in future releases, together with ldm issues such as no language options.
• Building powerpc (e.g. iMac) LTSP client on i386 (any Intel/AMD platform) is unsupported in Ubuntu Dapper,

Install LTSP Server

The LTSP server package includes the tools necessary to construct a MueKow image. If you have a web proxy you might want to configure apt to use it now if you are going to build multiple clients, edit /etc/apt/apt.conf.

Acquire::http::Proxy "http://[[user][:pass]@]host[:port]/";

Set the proxy environment variable for debootstrap.

$ export http_proxy=http://[[user][:pass]@]host[:port]/

Install the ltsp-server package and start to build the client, by default this will install from US based web server use the --mirror parameter to specify a local mirror or a CD-ROM based installation.

Regular install:

$ sudo apt-get install ltsp-server
$ sudo ltsp-build-client

Mirror install:

Example for China (cn):

$ sudo apt-get install ltsp-server
$ sudo ltsp-build-client --mirror http://cn.archive.ubuntu.com/ubuntu/

CD-ROM based install:

$ sudo apt-get install ltsp-server
$ sudo ltsp-build-client --mirror file:///cdrom

If this process ends prematurely because all the packages cannot be downloaded delete the entire LTSP directory and restart. (Ensure debootstrap >= 0.3.3.0ubuntu7: see dapper-backports repository in sources.list below).

$ sudo rm -rf /opt/ltsp/i386  
$ sudo ltsp-build-client

At the end it should look similar to this.

Cleaning up startup links in rcS.d ...
Cleaning up startup links in init levels: 2 3 4 5 ...
 * Re-exporting directories for NFS kernel daemon...                                                            [ ok ]
Removing `local diversion of /sbin/start-stop-daemon to /sbin/start-stop-daemon.distrib'

Update MueKow

Edit the apt configuration in MueKow and ensure the update repositories are enabled, /opt/ltsp/i386/etc/apt/sources.list

deb http://archive.ubuntu.com/ubuntu dapper main restricted
deb http://archive.ubuntu.com/ubuntu dapper-updates main restricted
deb http://archive.ubuntu.com/ubuntu dapper-backports main restricted
deb http://security.ubuntu.com/ubuntu dapper-security main restricted

Then synchronise upstream.

$ sudo chroot /opt/ltsp/i386/ apt-get update
$ sudo chroot /opt/ltsp/i386/ apt-get upgrade
$ sudo chroot /opt/ltsp/i386/ apt-get dist-upgrade

Setup SSH

To reduce network bandwidth used by X11 all traffic is tunneled through ssh, this proves remarkably effective compared to NX compression. In order for the LTSP clients to access the server the server needs to have its IP address configured and available for SSH. Edit /etc/hosts and if you have a host line 127.0.1.1 change to the LTSP server IP address.

10.30.2.20 ubuntu.example.org ubuntu

If you update the hostname also update the /etc/hostname configuration file and update the environment.

$ sudo sh -c "echo ubuntu.example.org > /etc/hostname"
$ sudo hostname ubuntu.example.org

If you changed the hosts file you will also need to update the LTSP client with the new ssh keys, these are encryption keys used to verify the remote host of a ssh connection is who it is supposed to be, i.e. not another host with the same IP address.

$ sudo ltsp-update-sshkeys

Configure LTSP Clients

The configure file /opt/ltsp/i386/etc/lts.conf contains a list of X11 and LTSP configuration options that can be specified for individual or groups of machines. This can include X11 servers, mice, keyboards, attached devices, etc. The minimum configuration is the SERVER address, here we drop down to high colour graphics to improve performance a bit.

[Default]
# LTSP server IP address
#SERVER                 = server
SERVER                  = 10.30.2.20

## Network syslog
#SYSLOG_HOST            = server

## X11 driver, e.g. auto, vesa, i810
#XSERVER                 = auto
#X_COLOR_DEPTH           = ""
X_COLOR_DEPTH           = 16
#XF86CONFIG_FILE        = ""

## Keyboard configuration
#XKBLAYOUT              = us
#XKMODEL                        = pc105
#XKBRULES               = xorg
#XKBOPTIONS             = lv3:ralt_switch
#XKBVARIANT             = ""
#CONSOLE_KEYMAP         = ""

## Mouse configuration
#X_MOUSE_DEVICE          = /dev/input/mice
#X_MOUSE_PROTOCOL        = auto
#X_MOUSE_EMULATE3BTN    = True

## X11 font server
#USE_XFS                 = False
#XFS_SERVER             = server

## SSH compression between LTSP client and server
#NETWORK_COMPRESSION     = False

## Network swap device for clients < 48 MB system memory
#NBD_SWAP                = ""
#SWAP_SERVER            = server
#NBD_PORT               = 9572

## Local printers
#PRINTER_0_DEVICE       = ""

## Sound configuration
#SOUND                   = False
#SOUND_DAEMON            = esd

## Terminal sessions
#SCREEN_07              = ldm

## Linux modules
#MODULE_01              = ""

## Custom startup scripts
#RCFILE_01              = ""
#LDM_REMOTECMD          = ""

Note that Ubuntu Dapper does not support local applications or local media. The configuration file can use "Y", "Yes", "T", or "True", but the audio will only work with "True".

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