The SIGILL/core is interesting. Do you see anything on the host dmesg related to the process. Else does it do the same if you run the command through docker invoking a shell. docker -i -t ubuntu ...

It's hard to be certain, but the entrypoint is likely referring to one of the setuptools entry points, and so it's the installer that's detecting that setuptools or one of its dependencies isn't ...

Replace “python” with “python3” for installing Python 3.x version. Please note that get-pip.py will also install setuptools and wheel. As I mentioned earlier ...

Making sure pip and setuptools are properly installed is important because they manage package setup. If they are missing or outdated, they can prevent installations. Updating or reinstalling them ...