I have recently upgraded from Ubuntu 15.10 to 16.04. when i was using 15.10 ethernet works flawlessly. But after upgrading to 16.04 it doesn't work anymore showing network cable unplugged. I tried reinstalling driver & end up getting following error

sumit@Lenovo-Z50-70:~/Desktop/r8168-8.041.01$ sudo ./autorun.sh

[sudo] password for sumit:



Check old driver and unload it.

rmmod r8169

Build the module and install

make[2]: *** No rule to make target 'kernel/drivers/net/ethernet/realtek'.  Stop.

make[1]: *** [install] Error 2

make: *** [install] Error 2

When i had installed in 15.10 it was installed successfully.
My ethernet controller is: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev10).
I have done all proxy settings same as they were in 15.10.

Please help. :(