This site is being deprecated.
Please see the official X‑Plane Support page for help.
Any time I've started X-Plane through the terminal (Mac) it's been much "noisier" than the log.txt file. I have personally not paid too much attention to it as it never prevented me from using the sim. It's probably not a bug, but you may find quicker and more thorough help with X-Plane on Linux in the X-Plane.org forums.
This site is no longer being actively maintained.