use "echo" via keybindings in openbox

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https://bbs.archlinux.org – Hi all,is there a possibility to use the "echo" command via a keybind in openbox? If I edit the rc.xml with these lines:   <keybind key="Help"> <action name="Execute"> <execute>echo 1 | sudo tee -a /sys/devices/platform/sony-laptop/kbd_backlight</execute> </action> </keybind>I just get in the openbox-terminal the output 1 | sudo tee -a /sys/devices/platform/sony-laptop/kbd_backlightBut of course that´s not what I want. I want to be written "1" into the file. Out of a terminal it works fine, b (HowTos)