X,Y, and Z Axes are Reversed

Linux CNC has been running fine until this morning. Now left is right and up is down. I thought it might somehow be the Vectric g-code, but this happens before I even run anything ... can't "home all." and can't use the arrow keys on the keyboard as they are backwards.

This isn't a hardware configuration problem -- everything was running fine last night. The only thing that seems to have changed is today is Thursday instead of Wednesday. Why / how is it even possible for LinuxCNC to start doing this? What is the fix?

Thanks!

are you sure , nothings changed ?
have you picked up a different ini file by mistake ?
any updates etc

This particular unix machine is not connected to the internet and has not had any updates. It's using Axis 2.5.

Out of desperation, I wiped down the x axis limit switch (again) (because it was the only thing exposed that had some sawdust on it. Then I re-booted (4th time on the re-boot). It magically fixed itself. Have no idea what happened.

Ditto Andypugh. Could a new install of LinuxCNC and Axis be in order? Today, after setting the touch off points, another weird mishap caused the bit to not lift high enough over the wood. The bit crammed into the wood from the side, jammed downward into the spoiler board, and commenced to drill the design. Emergency stop. Check the bit. Breathe. Re-boot. Home all. Touch Off Again. All was fine the second time. I suspect I forgot to "do something" that initial instance, but I can't think of what. Either way, the previous board was thicker, so the Z axis was higher than this particular job, so even if I had missed the touch-off stage for the Z axis, wouldn't the pre-existing Z axis touch-off point preside?

I will check to see what the last modification date for the HAL and INI files is, but the files came pre-installed with the Probotix Unix setup. I downloaded the post-processor from their website. Everything has been solid and ready-to-go.

Tom ... signal grounding? Sorry -- noob here. Signal Grounding?

Gads.