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the ifconfig only shows wlan0 and l0, no eth0, tried to edit /etc/network/interfaces to asst auto eth0, then run init.d networking restart, it said, eth0 device cannot be found, anyone has similar issue

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First Check in Additional Driver, You need to install driver. –  K.K Patel Nov 15 '12 at 5:03
    
does ifconfig -a list any ethernet ? Does /etc/udev/70-persistent-net.rules contain any ethx? If not then you need to figure out what driver you are missing. dmesg might give you a clue if the ethernet card is failing to load. –  axlroden Nov 15 '12 at 9:13
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An eth0 interface is only created when a driver claims your hardware. Your question suggests there is no driver. Please edit your question to add details about your wired hardware from: lspci -nn –  chili555 Nov 15 '12 at 12:31

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