USB adapter read/write permissions

[tristanlee85]

I have a USB to Serial adapter I am using with Fedora 11 and I have permission problems. I have added myself to the following groups:

[tristan@localhost TunerStudio_v0.988.7_64Bit]$ cat /etc/group | grep -i tristan
tty:x:5:tristan
uucp:x:14:uucp,tristan
lock:x:54:tristan
tristan:x:500:

However, in order for the program to see my USB device as ttyUSB0, I have to sudo and set permissions as 777 on that device.

Is there possibly a different group I need to be a part of to have permissions?

[Irithori]

what does
ls -la /dev/ttyUSB0
say?

[tristanlee85]

Here is the output with it already plugged in and 777 permissions and then I unplugged it and plugged it back in and ran the command:

// already set at 777
[tristan@localhost ~]$ ls -la /dev/ttyUSB0
crwxrwxrwx 1 root dialout 188, 0 2009-07-27 16:39 /dev/ttyUSB0
// removed and re-inserted the device
[tristan@localhost ~]$ ls -la /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 0 2009-07-27 16:44 /dev/ttyUSB0
[tristan@localhost ~]$

[Irithori]

ok, add your user to group dialout

[tristanlee85]

I tried adding myself to the dialout and root group, but still no success.

[tristan@localhost ~]$ cat /etc/group | grep -i tristan
root:x:0:root,tristan
tty:x:5:tristan
uucp:x:14:uucp,tristan
lock:x:54:tristan
dialout:x:18:tristan
tristan:x:500:
[tristan@localhost ~]$ ls -la /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 0 2009-07-28 09:29 /dev/ttyUSB0
[tristan@localhost ~]$

[Irithori]

log out, then log in again

[tristanlee85]

I had tried that before posting as well as a reboot.

[tristanlee85]

Bring this back from the dead, I had managed to find a file that would allow me to set permissions/ownership of the device when it is plugged in. Basically, what I did was give the device root ownership and 777 permissions. This fixed my issue above. However, I can't seem to find this file anymore. Any idea what I am talking about and where it could be found?