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gammu and device permissions

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linux-howto

http://askubuntu.com – I have Ubuntu Server 12.04 LTS and on it I have installed gammu. I use it to control my "Nokia 5310 Xpress music" cell phone. Now when I run "gammu --identify" it does not work, says I dont have the right device permissions, but it works with "sudo gammu --identify"... Now my Nokia device is listed as ttyACM0 in my /dev/ directory... its permissions are rw for root and dialout... I tried to change these permissions so that I can use this device with gammu without sudo ... I did "sudo chmod 777 /dev/ttyACM0" and it changed the permissions, but still it did not work... I even went and added a (HowTos)