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===== Installing ROOT using a python virtual environment =====

Sign in to
 LENGAU and then ssh to dtn

Ensure that your base conda environment has been initialised for your user on LENGAU. If it has already been initialized you should observe (base) alongside your user ID. This means that .bashrc file has been modified to incorporate conda directives. If not start here: https://wiki.chpc.ac.za/guide:python?s[]=%2Apython%2A

Sanitize your shell environment and then load the BIOMODULES module: 

<code bash>
module purge
module add chpc/BIOMODULES
</code>

Here is how you create a new environment with ROOT preinstalled:
<code bash>
conda create -n root_env root -c conda-forge
</code>
This will make a new environment called root_env, and install ROOT into it. Installation times may vary. When I did it it took between 3-5 minutes...

When the installation completes successfully, you can list all your environments and their paths using:
<code bash>
conda info --envs
</code>
The full path to the root installation amongst others will appear. 

Check whether the ROOT package has been installed, if successfully installed, it should appear in the list of packages:
<code bash>
conda list
</code>

Activate the conda ROOT environment:

<code bash>
conda activate root_env
</code>

Launch ROOT: 
<code bash>
root
</code>

Deactivate the environment when done using:

<code bash>
conda deactivate
</code>

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