Harald Hoyer wrote: > let the program run as user <myuser> > put <myuser> in group lp and uucp in /etc/group I think the program is a client application, not a server. Thus we can't really have it run as another user. I guess it's possible for a client application to use the serial ports, isn't it ? So how can we do that ? -- http://gauret.free.fr ~~~~ Jabber : gauret@xxxxxxxxxxxxx A: Because we read from top to bottom, left to right. Q: Why should i start my reply below the quoted text ?