Removed network-manager and now stuck
First, confirm that your ethernet card has a driver and has created an interface, ideally eth0:
ifconfig
If so, please amend your /etc/network/interfaces file to read:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
Now try to connect:
sudo ifdown eth0 && sudo ifup -v eth0
The '-v' for verbose should produce some output telling us either that you connected or what went wrong. If so, we'll try to correct it.
Please try a reboot and show us:
dmesg | grep eth0