[Mageia-discuss] Making the serial port available to all

Mon Sep 17 13:48:46 CEST 2012

On Monday 17 Sep 2012 03:08 my mailbox was graced by a message from Alejandro 
+López who wrote:
+> > I have a problem, in that whenever I want to use the USB Serial port at
+> > /dev/ttyUSB0 I have to log in as root. 
+> > I wonder if the way to solve this is by adding a rule
+> > /dev/ttyUSB0 root root 777 in Mcc > Security > Settings > Permissions or
+> > is there another way ?
+> > I have tried to change the permissions in /dev but they always revert to
+> > 660 after a time.
+
+> The devices in dev are recreated with each boot. This explains why they
+> loose the permissions. udevd is responsible for creating them at boot time,
+> following some rules. You need to modify those rules. If I remember
+> correctly, they are located in /etc/udev/rules.d/.
+
+I think I finally found a simpler solution: 
+/dev/ttyUSB0 (like all the /dev/ttyS*) belongs to the group dialout.
+
+So I just added my user to that group ("usermod -a -G dialout user" as root) 
+and logged in again.
+ 
+And I can now download my GPS data as user !
+
+Cheers,
+ 
+Ron.
+-- 
+               I'll defend to the death your right to say that,
+                      but I never said I'd listen to it!
+                     -- Tom Galloway with apologies to Voltaire
+                                    
+                   -- http://www.olgiati-in-paraguay.org --
+
+