[mailto:centos-bounces@centos.org] On Behalf Of Frank Cox Sent: Wednesday, December 03, 2008 3:50 AM To: centos@centos.org Subject: [CentOS] User access to /dev/ttyUSB0
I have been trying to get an EVDO modem to work with Centos 5. I can make it dial out with wvdial only when I'm the root user. Otherwise I get this error:
Cannot open /dev/ttyUSB0: Device or resource busy
I added the user to the uucp group.
crw-rw---- 1 root uucp 188, 0 Dec 3 02:30 /dev/ttyUSB0 crw-rw---- 1 root uucp 188, 1 Dec 3 02:30 /dev/ttyUSB1 crw-rw---- 1 root uucp 188, 2 Dec 3 02:30 /dev/ttyUSB2 crw-rw---- 1 root uucp 188, 3 Dec 3 02:30 /dev/ttyUSB3
What have I missed?
Hmm Lets see here... system-config-network Select (highlight) your PPP Adapter, then click on Edit. That will be under the Devices Tab. Next Look under the General Tab. Place a Check in "Allow all Users to enable or disable the Device".
JohnStanley