Solved Not Detecting Ethernet In Ubuntu

Solved Not Detecting Ethernet eth0 eth1 wlan0 In Ubuntu

1)
Goto following file and add eth0 and eth1 If you have two network interfaces
sudo vim /etc/network/interfaces

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet dhcp

2)
Remove following line
sudo rm /etc/udev/rules.d/70-persistent-net.rules

3)
Restart
sudo reboot