Resistive touch screen calibration

Hello,I have just installed a PC with the last ISO of LinuxCNC available on the site.I use a resistive touch screen from a store checkout. Unfortunately, it is not correctly calibrated, the pointer is always next to the place where you press with your finger.How should touchscreens be calibrated on ISO LinuxCNC (debian 10 I think)? Could you detail me the procedure to follow please?

Hello, thank you for your answer. I searched and found the same results on google, it took me a little while to understand how it works.
But I could not solve my problem.

That would help knowing which touch screen driver (hardware) you have. For example, the eGalax touch screen driver is used by many touch screen manufacturers, such as Advantech. In this case you will be able to find a perfectly working driver for many linux version, including Debian, here: www.eeti.com/drivers_Linux.html. This comes with a utility for screen calibration and more.
 

Thank you very much for this link. My screen is indeed recognized as an "eGalax".
When I finish the rest of my CNC (I'm in the process of wiring) I will try to calibrate the touch screen again.

A lot of time went by, I tried several things and finally found a documentation that worked for me:
www.katjaas.nl/linux/touch.html

From this I was able to create a desktop launcher that launches a touchscreen calibration, stores the calibration data and applies it immediately.

I've shared the launcher file, otherwise, here's the command (which works in my case):