[CentOS] User access to /dev/ttyUSB0

Frank Cox theatre at sasktel.net
Wed Dec 3 08:50:10 UTC 2008


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?


-- 
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