I just setup a Mint virtual machine as a test and it all worked as expected so I'm not sure why you're having a problem. However you wrote earlier that you are using "Mint 21" but I can only find "Mint 20.1 LTS" - I assume that's what you meant? If so then I suggest that you create a new Linux user and try installing under that new user. If it works then it's something in your user account. If it fails then ... well, we're no worse off. :-)
On 23 May 2021, at 11:14, jbf
wrote: Then something is not making sense (to me).
.bashrc clearly shows: export PATH=$PATH:/home/me/bin/context/tex/texmf-linux-64/bin, so does that not mean that bin can be found via the path? So why does 'context myfile.tex' not work?
If I run a full path (. /home/me/bin/context/tex/texmf-linux-64/bin/mtxrun context myfile.tex) I get the message 'cannot execute binary file' and yet mtxrun is executable. I checked. Clearly I am making a basic error, but cannot work out what.
— Bruce Horrocks Hampshire, UK