Performed suggested changes to getting started/installation page

python/docs/source/getting_started/index.rst

@@ -20,7 +20,10 @@
 Getting Started
 ===============
 
+This page lists an overview of the basic steps required to setup & get started with PySpark.
+
 .. toctree::
     :maxdepth: 2
 
-    quickstart
+    installation
+	quickstart

python/docs/source/getting_started/installation.rst

@@ -0,0 +1,119 @@
+..  Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+
+..    http://www.apache.org/licenses/LICENSE-2.0
+
+..  Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+
+============
+Installation
+============
+
+The official release channel is to download it from `the Apache Spark website <https://spark.apache.org/downloads.html>`_.
+Alternatively, you can also install it via pip from PyPI.  PyPI installation is usually to use
+standalone locally or as a client to connect to a cluster instead of setting a cluster up.  
+
+This page includes the instructions for installing PySpark by using pip, Conda, downloading manually, and building it from the source.
+
+Python Version Supported
+------------------------
+
+Python 3.6 and above.
+
+Using PyPI
+----------
+
+PySpark installation using `PyPI <https://pypi.org/project/pyspark/>`_
+
+.. code-block:: bash
+
+    pip install pyspark
+	
+Using Conda  
+-----------
+
+Conda is an open-source package management and environment management system which is a part of `Anaconda <https://docs.continuum.io/anaconda/>`_ distribution. It is both cross-platform and language agnostic.
+
+Conda can be used to create a virtual environment from terminal as shown below:
+
+.. code-block:: bash
+
+	conda create -n pyspark_env 
+
+After the virtual environment is created, it should be visible under the list of conda environments which can be seen using the following command:
+
+.. code-block:: bash
+
+	conda env list
+
+The newly created environment can be accessed using the following command:
+
+.. code-block:: bash
+
+	conda activate pyspark_env
+
+In lower Conda version, the following command might be used:
+
+.. code-block:: bash
+
+	source activate pyspark_env
+
+PySpark installation using ``pip`` under Conda environment is official. 
+
+PySpark can be installed in this newly created environment using PyPI as shown before:
+
+.. code-block:: bash
+
+	pip install pyspark
+
+`PySpark at Conda <https://anaconda.org/conda-forge/pyspark>`_ is not the official release.
+
+Official Release Channel
+------------------------
+
+Different flavor of PySpark is available in `the official release channel <https://spark.apache.org/downloads.html>`_.
+Any suitable version can be downloaded and extracted as below:
+
+.. code-block:: bash
+
+    tar xzvf spark-3.0.0-bin-hadoop2.7.tgz
+
+An important step is to ensure ``SPARK_HOME`` environment variable points to the directory where the code has been extracted. 
+The next step is to properly define ``PYTHONPATH`` such that it can find the PySpark and 
+Py4J under ``$SPARK_HOME/python/lib``, one example of doing this is shown below:
+
+.. code-block:: bash
+
+    cd spark-3.0.0-bin-hadoop2.7
+    export SPARK_HOME=`pwd`
+    export PYTHONPATH=$(ZIPS=("$SPARK_HOME"/python/lib/*.zip); IFS=:; echo "${ZIPS[*]}"):$PYTHONPATH
+
+Installing from Source
+----------------------
+
+To install PySpark from source, refer `Building Spark <https://spark.apache.org/docs/latest/building-spark.html>`_.
+
+Steps for defining ``PYTHONPATH`` is same as described in `Official Release Channel <#official-release-channel>`_. 
+
+Dependencies
+------------
+============= ========================= ====================
+Package       Minimum supported version Note
+============= ========================= ====================
+`pandas`      0.23.2                    Optional
+`NumPy`       1.7                       Optional
+`pyarrow`     0.15.1                    Optional
+`Py4J`        0.10.9                    Required
+============= ========================= ====================
+
+**Note**: A prerequisite for PySpark installation is the availability of ``JAVA 8 or 11`` and ``JAVA_HOME`` properly set.