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conda activate

CommandNotFoundError: Your shell has not been properly configured to use 'conda activate'.
If your shell is Bash or a Bourne variant, enable conda for the current user with

    $ echo ". /root/anaconda3/etc/profile.d/conda.sh" >> ~/.bashrc

or, for all users, enable conda with

    $ sudo ln -s /root/anaconda3/etc/profile.d/conda.sh /etc/profile.d/conda.sh

The options above will permanently enable the 'conda' command, but they do NOT
put conda's base (root) environment on PATH.  To do so, run

    $ conda activate

in your terminal, or to put the base environment on PATH permanently, run

    $ echo "conda activate" >> ~/.bashrc

Previous to conda 4.4, the recommended way to activate conda was to modify PATH in
your ~/.bashrc file.  You should manually remove the line that looks like

    export PATH="/root/anaconda3/bin:$PATH"

^^^ The above line should NO LONGER be in your ~/.bashrc file! ^^^

/opt/spark-2.2.0-bin-hadoop2.7//bin/spark-class: line 71: /usr/lib/jvm/java-8-oracle/bin/java: No such file or directory
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/hail/python/hail/typecheck/check.py", line 547, in wrapper
    return f(*args_, **kwargs_)
  File "/opt/hail/python/hail/context.py", line 160, in init
    default_reference, force_ir)
  File "/opt/hail/python/hail/typecheck/check.py", line 547, in wrapper
    return f(*args_, **kwargs_)
  File "/opt/hail/python/hail/context.py", line 35, in __init__
    SparkContext._ensure_initialized()
  File "/opt/spark-2.2.0-bin-hadoop2.7/python/pyspark/context.py", line 283, in _ensure_initialized
    SparkContext._gateway = gateway or launch_gateway(conf)
  File "/opt/spark-2.2.0-bin-hadoop2.7/python/pyspark/java_gateway.py", line 95, in launch_gateway
    raise Exception("Java gateway process exited before sending the driver its port number")
Exception: Java gateway process exited before sending the driver its port number