Updating Geant4

Occasionally CERN will release patches or updates for Geant4. To update your version of Geant4 
you will need root-access (using command '''“su”'''). 

'''Before carrying out this process PLEASE make sure that you back-up any work that you have 
saved in the Geant4-build or Geant4-install directories.'''

# Open a command terminal and log in as root user. Type '''“su”''' followed by your password when prompted
# Change the present working directory to the Geant4-build directory using the command: 


cd /home/your_name/Desktop/Geant4-build


# Type the command: make uninstall
# When this is done you will need to delete the folders Geant4-install and Geant4-build. To do this change your present working directory to the Desktop using the command 


cd/home/your_name/Desktop


# Now type the following command to delete the Geant4-build folder:

rm –rf Geant4-build

# When this is finished type the following command to delete the Geant4-install folder:

rm –rf Geant4-install

# Type the command '''exit''' to quit root-user mode
#Now download the updated version of Geant4 and install it as directed by pp. 4-5 (using cmake –DCMAKE…..)