Downloading the Geant4 package

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<pre style="color:#ff0000; background:#ffffff">
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<span style="color:#ff0000">'''NOTE:''' for the duration of this guide, replace ''“your_name”'' in any example directory with your username. You can find your username by clicking on the Linux menu button “System”.  
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'''NOTE:''' for the duration of this guide, replace ''“your_name”'' in any example directory with your username. You can find your username by clicking on the Linux menu button “System”. Next '''Preferences''' > '''About me'''. In the top-right hand corner your username will be written.
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Next '''Preferences > About me'''. In the top-right hand corner your username will be  
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written. </span>
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''' To install Geant4 you will need to download the Geant4 Linux package.'''
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To install Geant4 you will need to download the Geant4 Linux package.
 
# Navigate to the website: [http://geant4.cern.ch/support/download.shtml Geant4 download] and click '''Dowload''' for the option “GNU or Linux tar format, compressed using gzip”
# Navigate to the website: [http://geant4.cern.ch/support/download.shtml Geant4 download] and click '''Dowload''' for the option “GNU or Linux tar format, compressed using gzip”
# The standard download location is “/home/your_name/Downloads. You may have changed your download location so navigate to this folder.
# The standard download location is “/home/your_name/Downloads. You may have changed your download location so navigate to this folder.
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'''The Geant4 unzipped folder'''
'''The Geant4 unzipped folder'''
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The unzipped folder contains several subdirectories. These folders are essentially the installation packages and files. You need not concern yourself at all with them; the command terminal will deal with them.
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The unzipped folder contains several subdirectories. These folders are essentially the installation packages and files. You need not concern yourself at all with them; the command terminal will deal with them.
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'''Linux terminal'''
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Now that the package has been fully unzipped you will need to to open a Linux Terminal. You can do this by using the Linux menu system: Applications > Sytem Tools > Terminal
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'''Installing libraries'''
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'''ONLY CARRY OUT THIS PAGE IF YOU CAN GET ROOT ACCESS'''
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<pre style="color:#ff0000">
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NOTE:  To install these additional libraries ensure you are using the terminal as a root user.
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If using a UCL computer, these libraries should already be installed and you can skip to the
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next page. If these libraries are not installed contacted your system administrator for help.
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</pre>
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How to use terminal as root user
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Open a command terminal (as shown on the previous page) and type
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'''“su”''' into the command terminal.
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You will then be prompted to enter a password. Please enter the root password that you set up
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when you installed linux. When you type the password you will '''not''' see any new characters
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appearing on the screen. THIS '''IS NORMAL'''. When you have entered your password, press the
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return key. You should now be presented with the line: [root@localhost your_name]#
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The first set of libraries you will need to install are the '''expat''' libraries. This library
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resolves '''XML''' files. To install these libraries type the command
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<pre style="color: #800000; background-color: #dcdcdc">
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sudo yum install expat*
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</pre>
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The * makes sure that all libraries with the word “expat” are installed. When prompted to type Y or
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N, type '''Y''' followed by the '''return''' key.
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You will now need to install the mesa libraries. These libraries contain the visualiser '''OpenGL'''
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To install these libraries type the command:
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<pre style="color: #800000; background-color: #dcdcdc">
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sudo yum install mesa*
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</pre>
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You will finally need to install the library '''cmake'''. This library allows you to build and run Geant4 simulations. Type the command
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<pre style="color: #800000; background-color: #dcdcdc">
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sudo yum install cmake
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</pre>
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Latest revision as of 14:18, 16 July 2014

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