USB Permission Linux

create permission file

example path: /etc/udev/rules.d/45-nanofury.rules

content: 

ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="00de", SUBSYSTEMS=="usb", ACTION=="add", MODE="0666", GROUP="plugdev"

reboot or:

Restart udev

If you want to restart udev without restarting the machine do this: (Redhat, EL6, Fedora)

Debian
sudo udevadm control --reload-rules

some others 
start_udev 

test
udevadm test /sys/class/block/usb

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