Dear ET users,
I am following the CactusTutorial.ipynb notebook to install ET in a workstation in my institute.
Among the prerequisites there is the "python-is-python3" package which symlinks /usr/bin/python to python3.
The workstation has a slightly older Ubuntu version installed (18.04 LTS) and does not find this particular package for installation.
I do not have rights to perform a system upgrade / or install a newer Ubuntu version.