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The default version of R under Ubuntu 20.04 is 3.46.43, and this is the version used by the R Studio Server web application. We are aware that many new R packages are only available for later R versions 3.5 and later, and will be installing a 34.5.x 2 version of R soon. It will be available from the command line via a command like R-3.5.x, but will not be used by R Studio Server
As part of the upgrade to the base R program, some R packages have also been upgraded. While we don't anticipate any problems arising from these updates, if you do notice a problem or have any questions, please Contact Us.
JupyterHub differences
The default system Python under Ubuntu 18.04 was Python 3.6.9, and the web-based JupyterHub Server used that version. The default system Python under 20.04 is Python 3.8.10. The differences between the Python 3.6 and 3.8 environments may affect your Python Notebook programs.
As for the set of available JupyterHub Server packages, the JupyterHub Server's Python environment is maintained in a Python3-based virtual environment separate from the system (command-line) Python, so all those packages are centrally managed by us. If you run into issues trying to use a Python package in the new JupyterHub environment, please Contact Us.
As part of the upgrade to the base Python program, some python packages have also been upgraded. While we don't anticipate any problems arising from these updates, if you do notice a problem or have any questions, please Contact Us.
How the compute server O/S upgrade may affect you
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We are working to update our POD Software Information to reflect globally-installed software available under Ubuntu 20.04, but it currently reflects only the 2018.04 environment.
Incompatible user-installed programs
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