>Do another ls -al on those created files after making those adjustments. > Thank you for the advice. I've created a 10-visor.rules file with the line as you had it written, and removed the old file just to be sure. Unfortunately, it looks as though the permission settings are exactly the same as before. Here it is now: [root at localhost rules.d]# ls -al /dev/ttyUSB* /dev/pilot lrwxrwxrwx 1 root root 7 Sep 4 01:54 /dev/pilot -> ttyUSB1 crw-rw---- 1 root uucp 188, 0 Sep 4 01:54 /dev/ttyUSB0 crw------- 1 dave uucp 188, 1 Sep 4 01:54 /dev/ttyUSB1 Here is what it was: [root at localhost dev]# ls -l /dev/ttyUSB* /dev/pilot lrwxrwxrwx 1 root root 7 Sep 3 11:57 /dev/pilot -> ttyUSB1 crw-rw---- 1 root uucp 188, 0 Sep 3 11:57 /dev/ttyUSB0 crw------- 1 dave uucp 188, 1 Sep 3 11:57 /dev/ttyUSB1 Is there anything I can do in the 10-visor.rules file or elsewhere that will force the tty files to be created with permissions accessible by the user "dave"? Dave