I used Arduino successfully on my old Linux Fedora 12 system. Now I have a brand new PC with Fedora 20, and have today installed Arduino on it. In my first attempt to use it I typed Arduino as follows at the root prompt, after the "yum install arduino" gave me "Complete!", as follows:
Complete! [root@localhost:/home/Harry]# arduino WARNING: RXTX Version mismatch Jar version = RXTX-2.2 native lib Version = RXTX-2.2pre2
Subsequently I have loaded the "Blink" sketch, and that is running nicely, whether I start the IDE from the command line, which still gives me the same WARNING, or from the desktop icon, which does not give it.
So my question is: please, does this WARNING matter? If so, what should I do about it?