Parallel Port Tester

Yes. Have just this moment installed Mint 20 and now going to follow procedure to install.

Thanks will keep you updated

That is Linuxcnc now running on Mint 20 which was no bother to install following instructions. Unfortunately I still can not get ptest to work as it still cant find port. Ahead but no further forward.

If your pc only has 1 parallel port, have you tried just using the line
Or if you have 2 ports you might need to use to access the "other" port.

What does the following command show at a command line?

Only have one parallel port

~$ loadrt hal_parport cfg="0"
bash: loadrt: command not found
hamish@hamish-HP-500B-Microtower:~$ sudo loadrt hal_parport cfg="0"
[sudo] password for hamish:
sudo: loadrt: command not found
hamish@hamish-HP-500B-Microtower:~$ cat /proc/ioports |grep parport
hamish@hamish-HP-500B-Microtower:~$

Looks like I have a problem with commands. Will look in "packages"?

shortcircuit48 wrote: hamish@hamish-HP-500B-Microtower:~$ cat /proc/ioports |grep parport
hamish@hamish-HP-500B-Microtower:~$

That means no parallel port !
Did you try lspci -v on Mint 20?