Running LEARNIX
Contents
1. Hidden Figure 12 The ubuntu directory on your Windows box If you decide to remove Ubuntu please don t just delete the directory Ubuntu under Windows is a good citizen and has registered itself with the authorities so it shows up in the Windows Program Manager If you want to remove the software uninstall it from there The ubuntu entry in the Program Manager is shown in fig 13 14 4 INSTALLING LEARNIX PS Add or Remove Programs 10 x amp Currently installed programs J Show updates Sort by Name DI Change or Notepad Size 4 51MB a Remove Sep Programs OpenOffice org 3 1 Size 339 00MB S Peazip 2 7 1 Size 9 20MB Add New Ubuntu Size 8 660 00MB Programs CH Click here ror s Orc information To change this program or remove it From your computer click Change Remove Ta Change Remove EE Add Remove VLC media player 1 0 3 74 77MB Windows Components Ee Windows Internet Explorer 8 4 48MB a ip Windows XP Service Pack 3 bh WinMover 3 2 0 6 0 43MB Set Program Access and X xming 6 9 0 31 62 37MB e Defaults Figure 13 Ubuntu in the Windows Programs Manager 4 3 Running LEARNIX in a Virtual Machine Virtualisation allows you to run one or more operating systems on another operating system A very popular and free software package that does this is named VirtualBox which is now owned by Sun Microsystems Sun Microsystems 2009 VirtualBox is wel2. 1st column and mount point 2nd column but leave the rest of the line as it is shown cd etc sudo cp fstab fstab bak sudo gedit fstab e fstab etc gedit File Edit View Search Tools Documents Help iB Sl s 94 a g E fstab xX f etc fstab static file system information Use blkid o value s UUID to print the universally unique identifier for a device this may be used with UUID as a more robust way to name S devices that works even if disks are added and removed See fstab 5 file system lt mount point gt lt type gt lt options gt lt dump gt lt pass gt proc proc proc defaults 0 0 was on dev sdal during installation UUID 95fc17a9 76fb 4fcc a3d2 977dbe89c57a ext4 errors remount ro 0 swap was on dev sda5 during installation UUID d506b86b ebc6 4b38 8382 18f783a3b190 none swap sw 0 dev scd media cdrom udf iso9660 user noauto exec utf8 0 0 dev fdo media floppyO auto rw user noauto exec utf8 0 0 axel mnt win share vboxsf rw uid 1000 gid 1000 0 0 Plain Text v Tab Width 8 v Ln 15 Col 39 Figure 24 Using the gedit text editor to auto mount the share at start up If this all sounds a bit complicated which it is then do not despair Use a USB drive instead To be honest we don t actually encourage you to mess with system critical files such as etc fstab unless you have at least a basic understanding of LINUX system administration D
3. 2 Storage Type Selecting Dynamically expanding storage here is a really good idea Dynamically expanding means that the file holding the virtual hard disk grows as required and only occupies as much space as needed but not the whole amount that you assigned to it in the next step 3 Location Give it a sensible name such as LEARNIX_2009 1 and make sure the location is what you want Please compare to fig 15 Size We suggest you set this to about 8GB There is no penalty in choosing a larger size The virtual hard disk file will only grow as large as required 4 Base Memory Size If you have enough physical RAM give Ubuntu at bit more than the suggested value 1GB is good but make sure that there is still enough RAM left for the Windows host Unlike the virtual hard disk this value is not dynamically assigned but allocated immediately when you start the virtual machine EL LEARNIX 2009 1 beta Settings i 2lsl Shared Folders Lists all shared folders accessible to this machine Use net use x vboxsvrishare to access a shared folder named share from a DOS like OS or mount t vboxsf share mount_point to access it 5 from a Linux OS This feature requires Guest Additions Figure 18 Setting up shared folders Once the new virtual machine is created click on the blue Storage label under the Details tab and point the virtual CD ROM drive to the LEARNIX ISO image you set up earlier on in
4. 7185 3891 1 SSE3 6558 3570 1 Cygwin 02 8066 2 03 7630 2 Table 2 Benchmark times seconds These results are dubious The seconds shown are as reported by the time command Only one virtual processor was available which was fully utilised However the user time is only half that of the elapsed clock time and the reported CPU usage was 49 It is unclear if this is a bug or a feature with VirtualBox Values shown in the table were doubled for creation of the plot No SMP results due to rpiece not working under Windows 6 4 Discussion Compile options Optimising the compilation by replacing the default O2 compiler Cygwin option with O3 or by installing the radiance sse3 package in addition to radiance leads to a speed improvement of around 10 It appears that the difference between the Ubuntu radiance and radiance sse8 packages is not 2 just O2 vs O3 but rather or additionally some different optimisation Radiance is only half as fast under Windows as it is under LINUX The SMP benchmark would not run With multi core processors becoming the norm nowadays this is a serious limitation if no work around can be found The problem appears to be with Windows file locking which only allows one application to write to a file but further investigation is necessary VirtualBox Single threaded result with VT x hardware virtualisation support enabled and disabled show no significant difference This com
5. Karmic Koala 32 bit gcc 4 41 This is what LEARNIX 2009 1 is based on Cygwin 2 573 2 3 gcc 4 3 2 Fedora 12 Constantine 32 bit gcc 4 4 2 Fedora is a popular LINUX distribution like Ubuntu It is included to have a LINUX system with compiled rather than pre packaged Radiance Radiance HEAD 18 Nov 2009 Radiance like any other software written in the C language can be compiled with different compiler options for hardware specific optimisation All systems on which Radiance was compiled from source code Cygwin Fedora were tested with the O2 and O3 compile switches Under LEARNIX Ubuntu natively and under VirtualBox the pre packaged binaries were used instead The difference here is that the test were run with and without the radiance sse8 package In the benchmark chart fig 30 below the colour coding refers to O3 O2 but should be read as without with radiance sse3 for Ubuntu based tests l Axel Jacobs Running LEARNIX In addition to testing with different optimisations the effect of single threaded vs multi threaded rendering SMP was tested On would expect that Radiance runs twice as fast if twice as many processors or cores on the same processor can be utilised See below if this is indeed the case The test parcour is Mark Stock s Radiance Benchmark Test Stock 2009 After the download it s as simple as extracting the archive and typing make For the SMP test that ut
6. Mingw CSN ee ee a Table 3 Pros and cons of the various methods of running LEARNIX and Radiance Most of you will probably stick to the CD ROM version of LEARNIX and just get used to the relatively slow boot process Please let yourselfs be reminded to treat the CDs with care Try to find a protective case to store them when you re not leaving them in the CD ROM drive of your computer Finger marks and scratches can cause problem that are not immediately noticable and very hard to track down You might decided to run the media test from the LEARNIX boot menu from time to time Please download and burn a new CD if this test fails 30 Axel Jacobs Running LEARNIX References Axel Jacobs 2008a Axel Jacobs Radiance Cookbook 2008a URL http luminance londonmet ac uk learnix docs radiance_cookbook pdf Axel Jacobs 2009a Axel Jacobs LEARNIX Web site Nov 2009a URL http luminance londonmet ac uk learnix Axel Jacobs 2009b Axel Jacobs LEARNIX FTP site Nov 2009b URL ftp luminance londonmet ac uk Axel Jacobs 2008b Axel Jacobs Radiance Tutorial 2008b URL http luminance londonmet ac uk learnix docs radiance_tutorial pdf Bob Glickstein and Guillaume Morin 2009 Bob Glickstein and Guillaume Morin GNU stow Web page Nov 2009 URL http www gnu org software stow Brouwer and Bryan 2009 Simon Brouwer and Ant Bryan Using MIDD Check sums Web page Nov 2009 URL http www openoffice org
7. any virtual machines yet In order to create a new virtual machine press the New button aak in the main tool bar located at the top of the window You can press the F1 key to get instant help or visit i Ra p af www virtualbox org For the latest information and news 3 Figure 14 VirtualBox after installation The only settings you might want to change in the Preferences is the default folders for Hard Disks and Machines The default setting is to put them somewhere under your Documents and Setting but we think its better to put them elsewhere The screenshot in fig 15 shows you that we decided to save them under D VirtualBox This keeps it all nice and tidy It also allows you to share the VMs with other users on the same computer 4 3 2 Setting up a Virtual CD ROM Now create a new virtual CD ROM in the Media Manager Point it to the ISO image which you downloaded from the LEARNIX FTP server see section 2 After this operation the Media Manager should look like the image in fig 16 TODO Check this against benchmark results 16 4 INSTALLING LEARNIX irtualBox Settings 2 x General General Input CG Update Default Hard Disk Folder di D WirtualBoxiHardDisks DI Language Default Machine Folder E D WirtualBox Machines DI EP Network VRDP Authentication Library vRDPAuth DI Select a settings category from the Jet on the Jeff side and move fhe mouse over a
8. dev_docs using_ md5sums html Canonical Ltd 2009 Canonical Ltd Ubuntu GNU LINUX Web site Nov 2009 URL http www ubuntulinux org Colin Harrison 2009 Colin Harrison Xming Web site Nov 2009 URL http www straightrunning com XmingNotes Energy Systems Research Unit 2009 Energy Systems Research Unit ESP r Web site Nov 2009 URL http www esru strath ac uk Programs ESP r htm Francesco Anselmo 2008 Francesco Anselmo A survival guide to Radiance on Win dows Presentation at the 7th International Radiance Workshop Oct 2008 Lawrence Berkeley National Laboratory 2009 Lawrence Berkeley National Labora tory Radiance web site Web site Nov 2009 URL http radsite 1bl gov radiance Radiance Community 2009 Radiance Community Radiance Online Web site Nov 2009 URL http www radiance online org Red Hat 2009 Inc Red Hat Cygwin Web site Nov 2009 URL http www cygwin com Stock 2009 Mark J Stock Radiance Benchmark Test Web page Nov 2009 URL http markjstock org pages rad_bench html 36 REFERENCES Sun Microsystems 2009 Inc Sun Microsystems VirtualBox Web site Nov 2009 URL http www virtualbox org Sun 2009 Sun VirtualBox User Manual Sun Microsystems Inc version 3 0 10 edition 2009 URL http www virtualbox org wiki Downloads Ubuntu Community 2009 Ubuntu Community Ubuntu Graphical Install Guide Web page Nov 2009 URL https help ubuntu com
9. disabled in LEARNIX Our students come from many different mostly European countries and supporting different languages in class is simply not an options We hope this isn t too much of an inconvenience There is one last thing that we would urge you to do before starting to use LEARNIX Instead of selecting the first option on the LEARNIX boot screen Try LEARNIX without any change to your computer please select option 2 Check CD for defects This will check the CD that you ve just burnt for defects Assuming that you have successfully tested the MD5 test sum see section 2 such defects could be caused by an incorrectly burnt CD scratches or fingerprints on the medium or a flaky CD ROM drive Whatever the reason you should not run the CD unless this test is passed without errors 10 3 RUNNING LEARNIX OFF THE CD ROM 3 2 1 Persistent Storage TODO Write me 11 Axel Jacobs Running LEARNIX 4 Installing LEARNIX 4 1 Doing a Normal Install This is the preferred way of installing Ubuntu This installation is started from the Install Ubuntu option which can be found in the System gt Administration option The graphical installer is very user friendly and easy to use A good step by step guide is available on the Ubuntu community web site Ubuntu Community 2009 lt 3 Applications Pla cs BES ne Bo a Q Sat Nov 14 23 20 sl Preferences gt gt Computer Janitor ZC Disk u
10. site which gives a nice overview of what MIDD sums are about and how you verify them Brouwer and Bryan 2009 We will use the software they recommend which is called digestIT 2004 After the installation the It is very likely that this URL will change in early 2010 Axel Jacobs Running LEARNIX software is available in the Explorer file manager through the context menu Simply right click over the LEARNIX iso file and let it compute the checksum like shown in fig 3 Then compare the result to what s in the LEARNIX iso md5 file The MD5 is a string of 32 digits and lower case characters It is either completely different or absolutely identical to the LEARNIX MD65 string Filename D learnix 2008 1_beta iso File Size 677627904 bytes DRRRRRR File 1 of 1 digestIT 2004 6lb9aab3bcf4d9826eda90cd9ld7eec4 learnix 2008 1 beta iso OK Save to File i BS D learnix 2008 1_beta iso md5 Notepad File Edit Search Yiew Format Language Settings Macro Run Window CAS 4 OAI C n s RA ul H leamnix 2008 1_betaiso md5 3 1 61bS9aab3bef 4d982 6edaSOcdSid7eec learnix 2008 1 beta iso nbchar 58 In Col 33 Sel 32 UNIX ANSI INS 4 Figure 4 Calculating the MD5 hash 3 RUNNING LEARNIX OFF THE CD ROM 3 Running LEARNIX off the CD ROM 3 1 Burning the CD ROM When you burn the ISO image to a CD R it s important to do this in RAW mode also referred to as Disk Image
11. the Media Manager Now is also a good time to set up shared folders Such folders will be accessible from the guest OS allowing you to share files between host and guest I decided to share D axel which is where I keep my project files and to name this share axel The screenshot in fig 18 demonstrates what this should look like although the actual names and folders are probably different on your setup Once the setup is complete the virtual LEARNIX machine should look similar to fig 19 18 4 INSTALLING LEARNIX in xi Fie Machine Help 3 Geh gt CH Details le Snapshots Description E General New Settings Start Discard Name LEARNIX 2009 1 beta e eene 05 Type SEH S ES LEARNIX 2009 1 beta af Powered Off System Base Memory 1000 MB Processor s 1 Boot Order CD DYD ROM Hard Disk VT xfAMD V Enabled Nested Paging Disabled Display Video Memory 12 MB 3D Acceleration Disabled 2D Video Acceleration Disabled Remote Display Server Disabled Storage IDE Controller IDE Primary Master LEARNIX 2009 1 beta vdi Normal 8 00 GB IDE Secondary Master learnix 2009 1g iso 660 01 MB Floppy Controller Floppy Device 0 Empty P Audio Host Driver Windows DirectSound Controller ICH ACS EP Network Adapter 1 PCnet FAST III NAT Serial Ports Disabled USB Device Filters 0 0 active Shared Folders Shared Folders 1 Figure 19 Settings of the LEARNIX virtu
12. the many different ways of running LEARNIX Because LEARNIX is based on Ubuntu GNU LINUX there is a wealth of information and help available out on the Internet Please consult your favourite search engine The terms LEARNIX and Ubuntu will be used interchangeably throughout the document If a certain topic only applies to one or the other this will be stated explicitly The technologies that will be covered in this document are listed below ey CD ROM section 3 USB memory stick section 4 4 Normal hard disk install section 4 1 lt gt gd N J Nee Wubi section 4 3 Wubi 2009 VirtualBox section 4 3 Sun Microsystems 2009 Additionally we will try to get Radiance running under Windows with the Cygwin UNIX environment This has nothing to do with LEARNIX but might be the only solution for those of you that have problems with the LEARNIX live CD Axel Jacobs Running LEARNIX gt E ck Cygwin Xming section 5 1 Red Hat 2009 Colin Harrison 2009 Table 1 attempts to give an overview of how the available install options affect the layout of your hard drive and whether or not they allow LEARNIX to be run side by side with Windows or not Think of the icons as an abstract hard disk and monitor The system has only Windows installed on the hard disk and it can only run Windows Fig 1 attempts to visualise this If this sounds confusing then this is probably only because it s too trivial The c
13. 1118 lib ray ESUFFIX exe CC gcc m m f Rmakefile Once the file is edited and saved and the editor is closed the installer immediately starts the compilation without any further interaction After a while the following message will be displayed Done Add usr local stow radiance HEAD 20091118 bin to the beginning of you execution path For C shell users put the following into cshrc set path usr local stow radiance HEAD 20091118 bin path For Bourne shell users put the following into HOME profile PATH usr local stow radiance HEAD 20091118 bin PATH export PATH Ignore the part about the execution path for now If instead of Done the message is There were some errors some of the Radiance programs did not compile You should be left with 133 files in the bin directory including a sub directory named dev ls usr local stow radiance HEAD 20091118 bin wc 1l 133 If this number is much smaller you need to find out what went wrong Please contact the radiance general mailing list If only a handful of files are missing you might have all the functionality that you require Start using Radiance and have your fingers crossed You might never even notice Three things still need to be done for Radiance to work correctly install the man pages run stow and edit the profile The man pages are stored under ray doc man and need to be copied to usr local stow radiance HEAD 20091118 man cd softw
14. 21 Axel Jacobs Running LEARNIX 4 3 7 Accessing a USB drive from the Guest OS USB devices such as thumb drives can be passed through from the host the physical Windows machine to the guest LEARNIX Here s what you do 1 Insert the USB drive 2 Select USB Devices from the virtual machine Device menu and click on the device that you wish to mount on the guest This is shown in fig 23 If this is the first time you are mounting that particular device Windows will install some VirtualBox drivers for it 3 Double click on the new icon on your desktop to open the file manager GB earnix 2009 1 beta Running Sun irtualBox Machine Devices Help lt 3 AE CD DVD Devices gt g E te gt B Floppy Devices oy Network Adapters Shared Folders 2 USB Devices Remote Display Corsair Flash Yoyager 1100 mme Product ID 1000 e Revision 1100 Serial No Ab00000000025450 Pa SL rios g State Busy e A Install Guest Additions Host D Figure 23 Passing a USB device through to the guest OS All done When you want to remove the device close the file manager and right click over the icon on the desktop Select Unmount This will remove the USB device from the guest OS and also from the Windows host so it s save to pull it out Note that USB device support is only available with the none OSE version of VirtualBox 4 3 8 Accessing Folders on the Host The most us
15. AD 20091118 bin mkdir usr local stow radiance HEAD 20091118 man Before the installer can be run some modifications to the source code need to be made Radiance comes with its own version of the libtiff library However it would not compile cleanly on my system which is why we are going to tell Radiance to use the Cygwin libtiff devel library instead I am going to refer to a block as a number of lines that are separated from the previous and the following block by a blank line This is probably not the correct terminology but will do the trick Likewise the name of the block is the first word on the first line of the block A word is is any combination of The 4 0 release of Radiance is immanent Nov 2009 Once the release has been made this file will probably be called rad4RO0 tar gz Please check by hovering your mouse over the link in you web browser This is under section Download newer CVS snapshots from this server Replace 20091118 with the date that you downloaded Radiance 28 5 RUNNING RADIANCE ON WINDOWS letters characters and special characters that is separated from the neighbouring words by a space or by a line break cd src px vim Rmakefile Make the following changes 1 Remove block common tiff h 2 Remove block lib libtiff a 3 Remove the word lib libtiff h from blocks ra ff and normtiff makeall install What is your prefer
16. Do not treat the ISO image like an ordinary file This would result in a process known as mastering and would put the ISO image inside another file invisibly to you What would you like to burn B Data 3 Music b i Videos Pictures Record a disc from disc image previously burned onto the hard drive g Exit Figure 5 You must burn the CD ROM as a Disk Image not as Data 3 2 Booting from the CD To boot from your shiny new CD shut down your computer if you are working under Windows but make sure the CD is in the drive Power on your computer With a bit of luck you will be greeted by the LEARNIX boot screen Try Ubuntu without any change to your computer Press F4 to select alternative start up and installation modes Fi Fe 3 5 F6 Figure 6 LEARNIX boot screen If this does not happen and your computer boots back into Windows instead Axel Jacobs Running LEARNIX then the BIOS of the computer is not set to boot from its CD drive To change this setting you need to access the BIOS and change the boot order This is done by holding down a certain key on the keyboard while or immediately after the computer is turned on Unfortunately there is no industry standard so that the key differs between manufacturers and sometimes even between different models from the same manufacturer Here are some fairly common choices ESC F1 F2 F10 F12 DEL INS The boot message the text that appears on the screen
17. Ee RRB SERRE 7 Conclusions References Running LEARNIX 25 ee eee 25 Ree een ae 25 TEREPET 26 EE 27 ee ee 30 31 ae we ee eee l ae ee es l EECH 32 eu eke a he 33 35 36 Revision History 26 Nov 2009 e Added benchmark results 20 Nov 2009 e Draft document available for download on LEARNIX site 16 Nov 2009 e First draft 14 Nov 2009 e Put pen to paper CONTENTS Axel Jacobs Running LEARNIX Disclaimer This document is written with the intention of providing an overview of the various methods available to Windows users to get the Radiance rendering system working on their machine Most of the advice is centred around the LEARNIX live CD ROM but alternative methods are explored Niche operating systems such as MacOS X or Solaris are not covered Although step by step instructions are provided in various sections of this guide you absolutely MUST explore other documentation This is not limited to a study of the documentation available with the various software packages but should also include an exhaustive search for documentation on the Internet We take ABSOLUTELY NO WARRANTY WHATSOEVER for your computer and the data stored on it It might catch fire or suck you through a space time portal into a different dimension Don t say we didn t warn you As far as your data is concerned its integrity should be your number one concern at all times As an educated tech savvy computer user of course you take
18. Running LEARNIX Axel Jacobs lt a dot jacobs at londonmet dot ac dot uk gt November 26 2009 Axel Jacobs Contents 1 Introduction 2 Downloading LEARNIX 3 Running LEARNIX off the CD ROM 3 1 Burning the CD ROM 2 63 66664 e s0 E 3 2 Booting from the LD Ae AE e ye ed eaw gt 3 2 1 Persistent Storage 00206 4 Installing LEARNIX 4 1 Doing a Normal Install 4 2 Installing into the Windows Partition 4 3 Running LEARNIX in a Virtual Machine 4 3 1 Installing VirtualBox 4 3 2 Setting up a Virtual CD ROM 4 3 3 Creating a Virtual Machine 4 3 4 Installing LEARNIX to the Virtual Machine 4 3 5 Installing the VirtualBox Guest Additions 4 3 6 Keeping VirtualBox up to date 4 3 7 Accessing a USB drive from the Guest OS 4 3 8 Accessing Folders on the Host 4 3 9 Installing the LEARNIX Virtual Appliance 4 4 Running LEARNIX from a USB Stick 4 5 erter LEARNIX lt 242 64a 504 sees 5 Running Radiance on Windows 5 1 Running under Cygwin 004 5 1 1 Installing Cygwin 5 1 2 Installing AMIN a 6 ee a he ee oe HE 5 1 3 Installing Radiance 5 2 Adeline Desktop Radiance Mingw 6 Benchmark 0L Harware ssa acorn ri bed 2 oe aa a hE RH EY 6 2 Software aa aac scoa ENNEN DS betes sna kee EN eR RHEE ES 6 4 Discussion ee hak eee bo EN
19. Utils Shells Web Python Perl zip unzip gcc4 make patchutils gnuplot ImageMagick netpbm ed vim gvim tcltk libtiff devel libX11 libX11 devel libGL devel libGLU devel font adobe font alias font bitstream font encodings font misc misc font util fontconfig stow time bc bash completion mc tcsh wget python perl OTT lll D cygwin Oj xj File Edit View Favorites Tools Help ae y Back wi j Search K Folders dh 3 gt a i Address KC D cygwin Go var Cygwin bat Cygwin ico Figure 27 Directory structure of the Cygwin installation 5 1 2 Installing Xming Xming is an X server for Windows Colin Harrison 2009 The X Window system is a software system for UNIX that provides a graphical user interface GUI This is Select one that is close to you I could not find a site in the UK vim is my editor of choice but is not very straight forward to use You will want to pick another one from the list 26 5 RUNNING RADIANCE ON WINDOWS necessary for all graphical Radiance programs the three most important once being rvu cimage and trad You can run Radiance under Cygwin without Xming but won t be able to use graphical commands which would be a major inconvenience Xming comes in two versions Public domain release This one is free of charge and re distributable It s what we are going to use Website release Offers additio
20. al machine 4 3 4 Installing LEARNIX to the Virtual Machine Now it s time to launch the LEARNIX virtual machine by pressing the green arrow labelled Start You will be greeted by the same boot manager that you know from running LEARNIX from the real physical CD as shown in fig 20 The boot process should be much faster now and after a few moments you should find yourself looking at the LEARNIX desktop TEN ei 2009 1 beta Running Sun irtualBox ol x Machine Devices Help Try LEARNIX without any change to your computer el CC Right CH Figure 20 Booting the LEARNIX CD in VirtualBox Now proceed with a normal install as described on section 4 1 You don t need to worry about overwriting any important files The install will be onto the virtual hard disk Once the install is finished a pop up window will as if you wish to Continue Testing 19 Axel Jacobs Running LEARNIX or Restart Now Please don t restart now We need the VM to shut down not restart Do this by selecting Shut down from the System menu When the shut down is complete you are back at the VirtualBox main panel Go into the Settings and remove the virtual CD ROM It is no longer needed Now start the LEARNIX VM again 4 3 5 Installing the VirtualBox Guest Additions Installing the Guest Addition is not strictly speaking necessary but makes VirtualBox a lot more useful The following list is only a selection
21. are radiance ray doc man cp R man usr local stow radiance HEAD 20091118 man Secondly run stow This is just simple command but needs to be executed from usr local stow cd usr local stow stow radiance HEAD 20091118 Lastly add the following line to bash_profile export RAYPATH m usr local lib raym TODO Work out why trad doesn t work Is there a way to get rpiece working 5 2 Adeline Desktop Radiance Mingw Don t do it See Francesco Anselmo 2008 TODO Explain this To remove Radiance at a later stage please run stow D radiance HEAD 20091181 30 6 BENCHMARK 6 Benchmark Time is money they say If you are using LEARNIX to learn Radiance on our course or if you teach it to yourself almost any computer that still works should be good enough We still use a Pentium III laptop with a 750 MHz clock speed in class as a backup and it is usable In a commercial environment the story is slightly different You will be working under the pressure of looming deadlines so you will want to utilise the hardware as good as possible Read on to find out what you should and shouldn t be doing if speed is an issue to you 6 1 Hardware All benchmarks were run on the following computer Model Lenovo ThinkPad T61 CPU Intel Core Duo T7100 1 8GHz with Intel VT x virtualisation technology Memory 4GB RAM 6 2 Software Windows Vista SP2 32 bit VirtualBox 3 1 betal Ubuntu 9 10
22. blearnix media cdrom0 ls 32Bit VBoxLinuxAdditions amd64 run VBoxWindowsAdditions exe 64Bit VBoxLinuxAdditions x86 run VBoxWindowsAdditions x86 exe AUTORUN INF VBoxSolarisAdditions pkg autorun sh VBoxWindowsAdditions amd64 exe axel vblearnix media cdrom0 sudo VBoxLinuxAdditions x86 run sudo password for axel Verifying archive integrity All good Uncompressing VirtualBox 3 1 0 BETA1 Guest Additions for Linux VirtualBox Guest Additions installation tar Record size 8 blocks Building the VirtualBox Guest Additions kernel modules Building the main Guest Additions module done Building the shared folder support module done Building the OpenGL support module done Doing non kernel setup of the Guest Additions done You should reboot your guest to make sure the new modules are actually used Setting up the X Window System drivers Installing Xorg Server 1 6 modules done axeL vblearnix media cdrom0 C x Figure 22 Installing the VirtualBox Guest Additions sudo VBoxLinuxAdditions x86 run This command will take a moment to complete and then prompt you to reboot Please do so When the VM is back up you should notice some usability improvements Try for instance full screen mode press the host key default is the right CTRL key together with the F key The LEARNIX system running inside the VM should now cover the whole screen and the LEARNIX desktop should have re adjusted to t
23. community Graphicalinstall Wubi 2009 Wubi Wubi Ubuntu installer Web site Nov 2009 URL http wubi installer org 37
24. efer to compile Radiance yourself for instance because you need to use the very latest version hop over to the Radiance Community web site and download the sources Radiance Community 2009 This can be done without a browser using wget 27 Axel Jacobs Running LEARNIX Figure 29 Radiance s rvu in Xming under Windows cd mkdir p software radiance cd software radiance wget http www radiance online org software snapshots radiance HEAD tgz wget http www radiance online org software non cvs rad3R9supp tar gz tar xzf radiance HEAD tgz tar xvf rad3R9supp tar gz cd ray If all went all right this should have created the directory software radiance ray under your home directory and moved you into this directory The Radiance installer defaults to usr local bin as an install directory for the binaries and to usr local lib ray for library files This is fine until you want to remove the software or update to a newer version This is where stow comes in stow puts all files under one sub directory under usr local stow then links this whole tree to usr local Bob Glickstein and Guillaume Morin 2009 This keeps your system tidy and allows you to easily switch between versions You don t need to follow this advice but might want to give it a try To create the directory structure please type mkdir p usr local stow radiance HEAD 20091118 lib ray mkdir usr local stow radiance HE
25. eful improvement that you get by installing the Guest Additions is file sharing with your Windows host This is only possible from within the host OS You can not access files inside the VM from the host Getting this to work is a little difficult but if you follow the steps below it should only take a couple of minutes The shared folders on the Windows host have already been set up Please refer to section 4 3 3 if you need to remind yourself 1 Decide where you want to link in the shared folder Most commonly folders from other machines are mounted under the mnt directory on the guest We ll create the folder win_share for this example 2 In a terminal window go to the mnt directory and create a new directory with the name win_share 22 4 INSTALLING LEARNIX cd mnt sudo mkdir win_share 3 Mount the share from the host sudo mount t vboxsf o uid 1000 gid 1000 axel win_share Or sudo mount vboxsf o uid 1000 gid 1000 axel win_share You can now browse mnt win_share in the file manager and should be able read and write files there 4 Scary wasn t it To ensure this happens automatically from now on you need to edit the file etc fstab on the guest It s a critical system file that we don t want to get corrupted so please do make a backup first The screenshot of the text editor is given in fig 24 The last line is for mounting the share Please adjust for you particular share name
26. es as a bit of a surprise Note that it is necessary to enable hardware virtualisation for assigning more than just one core or processor to the guest OS Either way LEARNIX 2TODO see how Bernd compiles Radiance in his Ubuntu packages 33 Axel Jacobs Running LEARNIX under VirtualBox on top of Windows Vista is around half as fast as native LEARNIX and is comparable in speed to Cygwin If there is no solution to the SMP issue with Cygwin VirtualBox could at least allow all CPU cores to be utilised by Radiance 32 bit vs 64 bit We can t really tell from these results We might add another test comparing Radiance on Fedora 64 bit and compiled on Ubuntu 32 bit but even this is not an ideal comparison Don t hold your breath 34 7 CONCLUSIONS 7 Conclusions We don t really want to jump to any conclusions on your behalf so please do make your own decision LEARNIX runs fine just off the CD ROM so you don t need to install it at all That s the whole point of having a live system on a CD Installing to hard disk or running under VirtualBox will give you certain advantages but if those are worth the effort is up to you LC z S TO N a Som z Z p S g E x Q 2 Z S ZS 8 2 Mo or H H O H Ze a 2 E e gs 8 g as Ee Q O Pl e EE E et Ee CD ROM Lk USB stick S A e e HD install O So 2 o os e oe Wubi install o go o 2 af VirtualBox oe 2h oe Cygwin d Sa e bn eko es
27. et easy enough for you to remember And remember you must Once this is all done hit Install and the installer should start churning away You will be asked to reboot once it is done Upon reboot the Windows boot manager should come up with a new option Windows will still be the default so you need to go down so Ubuntu is highlighted like in fig 11 and press Enter Please select the operating system to start Microsoft Windows Ubuntu Use the up and down arrow keys to move the highlight to your choice Press ENTER to choose For troubleshooting and advanced startup options for Windows press F8 Figure 11 Windows boot manager If you browse your disk with the Windows file manager now you will notice a new folder named ubuntu This is where Ubuntu is installed and is shown in fig 12 The directory is as large as the Install Size you selected when installing Ubuntu BEE File Edit View Favorites Tools Help Sp General Sharing Customize Gren Search 1 Folders Lef L xX SS Address a ee na g Go U oke File Folder Ch 8 45 GB 9 081 200 277 bytes 8 45 GB 3 081 270 272 bytes Type a Documents and Settings Co Program Files Gal CO WINDOWS wubildr wubildr mbr EH N m MORF sf KB Location Size Size on disk Contains 8 Files 5 Folders 13 November 2009 05 29 14 Created Attributes IV Read only Advanced
28. hose settings Nifty isn t it 4 3 6 Keeping VirtualBox up to date It s important that the version number of the Guest Additions matches that of the VirtualBox Host If you update to a newer version of VirtualBox then the Guest Additions need to be re installed on the Guest Please refer to section 22 In addition to re installing the Guest Addition when a newer version of VirtualBox is installed on the host the Guest Additions need some maintenance whenever the kernel of the Guest OS changes Once you ve run LEARNIX Ubuntu LINUX for a while you will receive notification from the Update Manager letting you know that newer version of some of the installed software are available Obviously this only happens if you are connected to the Internet You are strongly advised to install those updates They are usually bug fixes that iron out glitches with the software or make your system otherwise more secure stable or usable Some of those upgrades but not all of them will require the Guest to be re started If this is the case the Update Manager will prompt you to do so If as part of the upgrade a newer version of the LINUX kernel is installed chances are the Guest Additions or at least some of the functionality they provide no longer work If this is the case please type the following command into a terminal window sudo etc init d vboxdrv setup You will need to reboot the VM for the changes to become effective
29. idea so don t panic Open or Browser the CD the double click on wubi ere This should give you the welcome screen from fig 9 Select Install inside Windows 12 4 INSTALLING LEARNIX Ubuntu CD Menu a x Demo and full installation Try Ubuntu without installing Simply reboot your machine with the CD in the tray You may perform a full installation From within the demo to install Ubuntu either alongside Windows or as the only operating system Install inside Windows Install and uninstall Ubuntu like any other application without the need for a dedicated partition You will be able to boot into either Windows or Ubuntu Hibernation is not enabled in this mode and disk performance is slightly reduced Learn more Ubuntu is a Free community developed linux based operating system complete with a web browser productivity software instant messaging and much more Cancel Figure 9 The opening screen of the Wubi Windows installer Li T T You are about to install Ubuntu 8 10 A Please select username and password for the new account a Installation Drive 10 GB Free Language B Installation Size GB Username oS ow en Password Desktop Environment lLeseses D Ubuntu e eeccce Accessibility Install Cancel Figure 10 Configuring the Wubi installer The installation procedure is kept very simple and only involved making a few decisions that are shown in fig 10 Insta
30. ilises all available cores two in our case the command is NCPU 2 make smp After the test is finished the time taken to render the scene is displayed The time is given for user system and clock User is the important one indicating the speed of the rendering 6 3 Results The benchmark was set at 100 for the single threaded result without radiance sse3 under Ubuntu because this is what s on LEARNIX The raw numbers are given in table 2 Instead of graphing the time taken to complete the test the reciprocal of this time is normalised to the single threaded Ubuntu result This is to get a bigger is better graph as shown in fig 30 i Ubuntu Single threaded 03 CH i i Fedora Single threaded O2 VirtualBox VTx VirtualBox VTx Multi threaded 03 SS Cygwin 3 Multi threaded O2 Y Ubuntu 8 Fedora VirtualBox VTx VirtualBox VTx Cygwin 0 50 100 150 200 25C Relative Performance Figure 30 Benchmark results on a dual core machine Do to the stochastic random nature of the raytracing engine in Radiance the number of rays may differ slightly between two runs This variation could be accounted for by plotting rays per second but is ignored here 32 Notes 2 6 BENCHMARK System Optimisation Single threaded SMP Notes Ubuntu 3935 2354 SSE3 3562 2107 Fedora 02 4364 2409 03 3459 1950 VirtualBox VT x on 7268 3897 SSE3 6713 3580 VirtualBox VT x off
31. immediately after the computer is switched on should indicate which key is assigned to entering the BIOS setup Some computers also have an additional Startup Menu which is independent of the BIOS settings allowing you to choose a temporary boot device Again there is no generally accepted convention for this When in doubt please consult your computer s manual or search on the Internet Afghanistan Esperanto Japan Nigeria Tamil Albania Estonia Kannada Norway Telugu Andorra Ethiopia Kazakhstan Pakistan Thailand Arabic Faroes Korea Poland Turkey Armenia Finland Kurdish Portugal Turkey EI Azerbaijan France Kyrgyzstan Romania UK Bangladesh Georgia Laos Russia USA Belarus Germany Latin Amer Saami Ein USA Intl Belgium Ghana Latvia Saami Nor Ukraine Bhutan Greece Lithuania Saami Swe Uzbekistan Bosnia Guinea Macedonia Serbia Vietnam Brazil Gujarati Malayalam Slovakia Bulgaria Gurmukhi Maldives Slovenia Cambodia Hungary Malta South Africa Canada Iceland Maori Spain China India Mongolia Sri Lanka Congo Iran Montenegro Sweden Croatia Iraq Morocco Swiss French Czechia Ireland Myanmar Swiss German SG Denmark Israel Nepal Syria Dvorak Italy Netherlands Tajikistan Figure 7 Selecting your keyboard layout If you do succeed in booting from the CD you will be greeted by the LEARNIX boot screen Please hit F3 and select a keyboard layout appropriate to your machine Ubuntu will also ask you select a language but this option is
32. l documented and you are encouraged to compare the very short introduction in this guide to the official User Manual Sun 2009 In VirtualBox terminology the existing operating system OS onto which the VirtualBox software is installed is called the Host OS and the one that is run in this virtual machine is called the Guest OS In your setup the Host will most likely be Windows or Mac OS X and the guest is going to be LEARNIX VirtualBox comes in two flavours VirtualBox Standard Edition This is the one we are going to use throughout this guide It s for personal use and evaluation under the terms of the VirtualBox Personal Use and Evaluation License VirtualBox Open Source Edition OSE This edition is released under the GNU Gen eral Public License GPL and comes with complete source code It is functionally equivalent to the full VirtualBox package except for a few fea tures that are primarily targeted at enterprise customers One such feature is USB support which allows you to pass USB devices such as thumb drives from the host to the guest Before we go any further let us take the opportunity to say a word or two about hardware support Running virtual machines VM on your computer is quite demanding on the hardware To make the execution of VMs faster many modern processors support what is known as hardware accelerated virtualisation Both Intel and AMD processors have this feature Intel calls it VI x and AMD
33. llation Drive It is always a VERY good idea to separate the system the operating system and applications from the user data you documents images music etc so you ve probably done this right In this case you should have a C drive and at least one other hard drive normally named D Ubuntu does not need to sit on C but if you have enough space see below you might as well install it there Installation Size I would recommend about 8GB The installer defaults to 12GB but you probably won t need that much Note however that it is not possible to assign more space at a later stage so if you think you might need it and if you have enough disk space go for 12GB Desktop Environment Not much choice here if you install LEARNIX Stick to Ubuntu Language We haven t actually tested this yet with languages other than English It should work but if you don t find it too awkward stick with English Note that if you are doing this install for the Building Simulation modules of the LEARN MSc course English is obligatory We will not be able to help you 13 Axel Jacobs Running LEARNIX with non English languages Yes you might call this cultural imperialism but you are taking the course in England aren t you Username Enter your name here or pick something nice such as the name of your favourite super hero No spaces and we would recommend an all lowercase spelling Password This should be secure y
34. mulate Run this first to see what packages will be installed y Yes Install ALL packages without asking You obviously need to be connected to the Internet The download will be about 200MB and an additional 700MB of disk space will be occupied after the installation You need to use sudo to run with the y option sudo learnix_sanitise sh y 24 5 RUNNING RADIANCE ON WINDOWS 5 Running Radiance on Windows This chapter doesn t really have anything to do with LEARNIX However the Cygwin software allows you to run LINUX software on a Windows machine so you might decide to use it for Radiance Please also have a look at Francesco Anselmo s A survival guide to Radiance on Windows Francesco Anselmo 2008 5 1 Running under Cygwin Cygwin is a Linux like environment for Windows Red Hat 2009 It consists of a LINUX emulation layer and a collection of tools which provide Linux look and feel Cygwin is not a way to run native LINUX applications on Windows They need to be re built from source Luckily Radiance is Open Source so there is no problem with getting hold of the source code 5 1 1 Installing Cygwin The installation of Cygwin is fairly easy Grab the setup exe from the Cygwin web site and run it An install wizard will guide you through the process see fig 26 ioi x Cygwin Net Release Setup Program This setup program is used for the initial installation of the Cygwin environment as well as all s
35. nal enhancements such as OpenGL support Access to the website release is gained with a small donation 10 is suggested This donation will support the development of the public domain release Grab the Xming and Xming fonts installers from the web site and install them both The installation is very straight forward Ge e E w oz Figure 28 The Xming server needs to be started before you can launch graphical LINUX applications You also need to add the following line to bash_profile export DISPLAY localhost 0 Once the installation is finished run XLaunch from the Windows Start menu You can run Xming in different modes We suggest you set it to Multiple windows Make sure the display number is set to 0 Select Start no client as session type This will cause Xming to quietly sit in the background until things are happening It s also a good ideal to enable the integrated clipboard manager After launch Xming will minimise itself to an icon as shown in fig 28 5 1 3 Installing Radiance Pre compiled versions of Radiance are available from Francesco Anselmo s web site Unfortunately at the time of writing 18 Nov 2009 the site was broken so I could not use his binaries We hope that by the time you read this guide the site is back up Dropping in the binaries is much easier than compiling Radiance on your machine Installation instructions should be available with the download If you pr
36. named it AMD V We would not recommend 15 Axel Jacobs Running LEARNIX that you try VirtualBox on a machine that does not have this hardware virtualisation 2 built in It will more than likely be painfully slow A number of cheap processors especially for portable computers do not offer this feature Please check the manual of your computer or browse the Internet to find you if your particular machine comes with hardware virtualisation You must find out the exact model number of your processor because computers can come in different configurations even if they share the same model number We recommend that you do not attempt to run a virtual machine if your system is does not have at least a dual core processor with VT x or AMD V support and 2GB of RAM Even if hardware virtualisation is available it might not be enabled in the BIOS Please see section 3 2 for a few tips on how to change BIOS settings 4 3 1 Installing VirtualBox Download the VirtualBox installer and run the setup There are not many options so just stick to the defaults After a short while you will be greeted by the VirtualBox welcome screen as seen in fig 14 g Sun irtualBox ioj x Fie Machine Help CG gt Details l Snapshots Description New Settings Start Discard Welcome to VirtualBox The left part of this window is intended to display a list of all virtual machines on your computer The list is empty now because you haven t created
37. o this and all other exercises in this guide at your own risk 4 3 9 Installing the LEARNIX Virtual Appliance TODO Investigate 23 Axel Jacobs Running LEARNIX 4 4 Running LEARNIX from a USB Stick TODO Write me fig 25 Ca Help and Support e So te About GNOME 3 About Ubuntu 43 Hardware Testing 2 gt Install Ba Log Out axel En P Language Support ut Down Le Login window CH Services Software Sources B Synaptic Package Manager L System Log a3 System Monitor Time and Date e Update Manager amp Users and Groups Figure 25 No caption here 4 5 Sanitising LEARNIX In order to gain the space necessary to put Radiance and ESP r on the CD we had to remove quite a few packages from the original Ubuntu CD We also took the liberty of removing stuff that you definitely don t want such as games Wouldn t want to get distracted in class would you If you decided to install LEARNIX using one of the technologies outlined in this document and would like to have all packages from the original Ubuntu CD installed as well please run learniz_sanitise sh learnix_sanitise sh This script will re install all packages that were on the original Ubunut CD ROM but had to be removed to create space for LEARNIX software Run this after installing LEARNIX to hard disk if you feel the need to have all the original packages around Options h Help Print this message S Si
38. of the features which are only available through the Guest Additions Mouse pointer integration No need to press the host key to free the captured mouse Better video support Allows you to run with extra high and non standard video modes as well as accelerated video performance You can also resize the virtual machine s window and the video resolution in the guest will be automatically adjusted Time synchronisation Regularly synchronises the time on the guest to that of the host computer Shared folders Access any directory on your host as a network share on the guest Shared clipboard Bi directional sharing of the clipboard FB LEARNIX 2009 1 beta Running Sun irtualBox Machine Devices Help i 1 lt 5 At C CD DVD Devices me Floppy Devices a EP Network Adapters Shared Folders CH USB Devices Remote Display Fa Install Guest Additians J E i Figure 21 Mounting the Guest Additions virtual CD ROM When you are back in the LEARNIX desktop select Install Guest Additions from the Devices menu like shown in fig 22 This mounts the virtual CD ROM on your LINUX guest Right click over the icon and select Open in Terminal Please see fig St Type the following command in the terminal 20 4 INSTALLING LEARNIX axel vblearnix eE To run a command as administrator user root use Sudo lt command gt See man sudo root for details axeL v
39. oncept behind the blue and orange boxes and squares should become clearer as you progress through this guide q Figure 1 Your computer before its first contact with LEARNIX No really Hard disk System Windows only Run from CD ROM Run from USB stick Normal install Install onto Windows VirtualBox Cygwin Table 1 How LEARNIX can be run and installed 2 DOWNLOADING LEARNIX 2 Downloading LEARNIX Index of ftp luminance londonmet ac uk pub learnix Mozilla Firefox g ol x File Edit view History Bookmarks Tools Help aE x Downloads 0 1 7 amp x ty a Ftp fluminance londonmet ac uk pub learnix Index of ftp luminance londonmet ac uk pub learnix Et Up to higher level directory Cra Name Size Last Modified IS learnix 2008 1_beta iso 661746KB 04 10 2008 18 51 00 E learnix 2008 1_beta iso md5 1 KB 04 10 2008 20 18 00 E learnix 5 0 1 iso 711308 KB 19 02 2007 00 00 00 B learnix 5 0 1 iso md5 1KB 19 02 2007 00 00 00 E old_releases 05 06 2008 12 02 00 fa L One active download 6 minutes remaining Z Figure 2 Downloading LEARNIX Fire off your web browser and go to the LEARNIX web site Axel Jacobs 2009a The Download section will take you to and FTP site on the same server Axel Jacobs 2009b The LEARNIX CD ROM is available as an ISO image which is usually just under 700MB in size Altho
40. red editor vi vim Where do you want the executables usr local bin usr local stow radiance HEAD 20091118 bin Do you understand and accept the terms of this agreement n y Please select your system type from the following list 1 Sun Solaris 2 Linux 3 MacOS X 4 FreeBSD 5 Cygwin 6 Other Choice 5 Where do you want the library files usr local lib ray usr local stow radiance HEAD 20091118 lib ray Install library files now n y Current rmake command is Do you want to change it y This will open the rmake file in your editor For Radiance to compile under Cygwin I had to make one small modification after which the file should look like this the option DEZXML_NOMMAP needs to be added to the MACH line bin sh exec make mSPECIAL og m OPT s 02m MACH m DEZXML_NOMMAP Dfreebsd L usr lib L usr X11R6 1lib I usr include X11 I usr X11R6 include DNOSTEREOm ARCH IBMPC mCOMPAT erf om INSTDIR usr local stow radiance HEAD 20091118 bin SRemember the footnote in section 5 1 1 This is where the editor comes in You should at least know how to open edit and save a text file with your editor of choice The license isn t actually displayed due to a bug so go and read it on the Radiance web site then agree here OTODO Figure out why inverted commas don t display in code sections Could be a font problem 29 Axel Jacobs Running LEARNIX LIBDIR usr local stow radiance HEAD 2009
41. regular backups of all your important and not so important data So in case anything goes wrong you know how to bring your system back up and how to recover your files 1 INTRODUCTION 1 Introduction This document is intended for all who wish to learn about the Radiance synthetic imaging system but are stuck with a Windows computer Radiance has been around since the early 1990s and has always been developed on UNIX machines Getting it to play nicely with a Windows computer is not trivial and there are several possible options None of them is straight forward to set up or convenient to use This is why the LEARNIX distribution has been developed by the Low Energy Archi tecture Research Unit LEARN LEARNIX is a live CD ROM which uses a modified ver sion of Ubuntu GNU LINUX to deliver a fully configured environment from which the Ra diance lighting simulation software can be run as well as the ESP r thermal building sim ulation package Canonical Ltd 2009 Lawrence Berkeley National Laboratory 2009 Energy Systems Research Unit 2009 By default LEARNIX only uses your computer s hardware but does not need to be installed Instead it is run off the CD ROM It is possible to install the CD onto your hard disk You might want to do this for improved speed running off the CD ROM can be quite slow or simply for the convenience of not having to juggle CDs This Getting Started Guide attempts to give you an overview of
42. settings item fo get more information cancel Hep Figure 15 Changing the VirtualBox default folders S vitualMediaManager 0 Actions 989 S 9 SG New Add Remove Release Refresh Hard Disks CD DYD Images E Floppy Images 660 01 MB Location D WirtualBox ISO learnix 2009 1g iso Attachedto Mot Attached Figure 16 Adding a CD ROM image to the VirtualBox Media Manager 4 3 3 Creating a Virtual Machine In the next step the virtual machine is created Press New on the main menu The wizard will walk you through a number of questions The first one shown in fig 17 is H the name of the machine and the type of guest operating system Please select Linux and Ubuntu here D Create New Virtual Machine 2 xi VM Name and OS Type Enter a name for the new virtual machine and select the type of the quest operating system you plan to install onto the virtual machine The name of the virtual machine usually indicates its software and hardware configuration It will be used by all irtualBox components to identify your virtual machine Name LEARNIX 2009 1 beta ros Type Operating System Linux D on Ca Version Ubuntu D lt Back net gt Cancel Figure 17 Creating a new virtual machine 17 Axel Jacobs Running LEARNIX The remaining options are explained in the list below 1 Boot Hard Disk Primary Master Create new hard disk
43. tili Help and Support ty S About GNOME 5 About Ubuntu BS Lock Screen E Log Out ubuntu iel Log File Viewer Login Screen E Network Tools CC Software Sources B Synaptic Package Manager _ G3 system Monitor E4 System Testing Cl Time and Date Q Update Manager 2 gt USB Startup Disk Creator E Users and Groups Figure 8 Launching the Ubuntu installer from a live session It is highly recommended that you make a full backup of your system before attempting to install Ubuntu this way Although the installer is easy to use it is possible to unintentionally over write all data on the hard disk Make sure you carefully read every single option and that you understand the implications of your choices Be double careful with all things that have to do with partitions resizing and formatting Having said that Ubuntu is actually a lot easier to install than Windows so don t be put off Just be careful 4 2 Installing into the Windows Partition This method is a very elegant solution for Windows users who don t want to mess around with their hard disks It s a great way of trying out LEARNIX with minimal effort The installation is very similar to a normal install except that it is launched from a running Windows system Under Windows simply put the CD ROM in your drive The installer should start automatically If it does not then the Windows Autorun feature is disabled This is normally quite a good
44. ubsequent updates Make sure to remember where you saved it The pages that follow will quide you through the installation Please note that Cygwin consists of a large number of packages spanning a wide variety of purposes We only install a base set of packages by default rou can always run this program at any time in the future to add remove or upgrade packages as necessary Cc Setup exe version 2 573 2 3 Copyright 2000 2007 http www cygwin com Cancel Back Figure 26 Cygwin setup 1 Install from Internet 2 Root Directory C cygwin Install for All Users Recommended Default Text File Type Unix binary Recommended 3 Local Package Directory D software cygwin 4 Internet Connection Direct Connection This depends on your network setup Please consult your network administrator 25 Axel Jacobs Running LEARNIX 5 Download Site ftp linux rz ruhr uni bochum de 6 Select Packages The list below is a little bit more than what is absolutely necessary and includes packages that are required for compiling Radiance Also included are packages that come in handy for your coursework or might be required to follow the Radiance Tutorial or the Radiance Cookbook Axel Jacobs 2008b Axel Jacobs 2008a You are free to boil down this selection to the minimum but are advised to consult a Radiance guru when doing so Archive Devel Graphics Editors Libs X11
45. ugh it is best to use a dedicated FTP client to download large files such as the ISO image you can simply use your web browser to get the file This is shown in fig 2 While you re at it also get the md5 file with the same base name We strongly recommend that you check if the download was successful by verifying the integrity of the image This is done with a checksum called MD5 hash The small file with the md5 extension contains the MD5 of the file as it is on our server If you compute the same check sum on the downloaded iso file it should be identical If it is not please download the iso file again and repeat the check summing 10 x File Edit View Favorites Tools Help ay Q sxx k pi J Search Folders ES Address Lens Go software File and Folder Tasks CJ test fm Rename this file LN Move this file learnix 2008 1_beta iso A Copy this file Kl screenshots Si m a Publish this file to the Web eg Open Tree SEH E leorie 2000 1 beta Bo mds Scan with AVG Free et HH 1KB digestIT 200 Calculate MDS Hash X Delete this file Edit with Notepad Calculate SHA 1 Hash n Verify MDS Hash ae a Verify SHA 1 Hash Cut d My Computer Copy My Documents Create Shortcut O Shared Documents Delete My Network Places Rename Properties Ss a Figure 3 Verifying the integrity of the download There is a page on the OpenOffice org web
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