to set a device's (acm0) file permission on boot
1. write 51-acm0.rules to /etc/udev/rules.d containing:
KERNEL=="ttyACM0", MODE="0777"
2. restart linux box to test
background: i have a usb device that is accessed by an application run by a standard user. the usb device appears as ttyACM0 and has to be of 777 file permission mode for the application to access it. the problem is whenever i boot the linux box the device appears with 555 file permission mode.
...but not anymore ;D
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