> Why did someone invent "usermod"? And when you do a ls -l on /dev/ttyS0, > the first serial port you notice: > > [root@k5di ~]# ls -al /dev/ttyS0 > crw-rw---- 1 root uucp 4, 64 2007-12-07 04:52 /dev/ttyS0 > [root@k5di ~]# > > The only way I can ever use Com1 is to be root or belong to the uucp Group. Did you ask how to do that? I have a file called /etc/security/console.perms.d/51-custom.perms It contains the following: # device classes -- these are shell-style globs <garmin>=/dev/ttyS0 # permission definitions <console> 0600 <garmin> 0660 root.uucp I wrote the file because I have a garmin gps that uses the serial port, /dev/ttyS0 With that file in place, I do not need to do something dangerous like add my user to the uucp group. I wish there was a gui tool to set that kind of thing up, though to be honest, there are very few device nodes for which you ever need to set that kind of thing up.
