My eth0 has gone and I don't have internet and network connection
I had internet connection, but when I upgraded my VGA and restarted my PC then everything for eth0 has gone.
When I used ifdown:
ifdown: interface eth0 not configured
Is there something I could do?
EDIT:
Content of /etc/network/interfaces
auto lo
iface lo inet loopback
When I ifconfig I don't have these lines:
inet addr:192.168.1.5 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::219:5bff:fe5e:a5e/64 Scope:Link
In the Terminal typed:
sudo gedit /etc/network/interfaces
and then added these lines in the bottom:
auto eth0
iface eth0 inet dhcp
then I typed:
sudo ifdown eth0
sudo ifup eth0
when I send the second command I received the below message:
No DHCPOFFERS received
No working leases in persistent database - sleeping
Any help?
Try:
sudo dpkg-reconfigure network-manager
If that doesn't work boot from a live CD, back up your old network settings, clear out any system connection file and copy over the ones from the live CD.
Change to Root:
sudo su
backup:
mv /media/<Name of your Ubuntu Partion>/etc/NetworkManager/NetworkManager.conf /media/<Name of your Ubuntu Partion>/etc/NetworkManager/NetworkManager.conf.broken
clear:
rm /media/<Name of your Ubuntu Partion>/etc/NetworkManager/system-connections/*
copy:
cp /etc/NetworkManager/NetworkManager.conf /media/<Name of your Ubuntu Partion>/etc/NetworkManager/NetworkManager.conf
cp /etc/NetworkManager/system-connections/* /media/<Name of your Ubuntu Partion>/etc/NetworkManager/system-connections/
Can you try to edit /etc/network/interfaces and put it the default settings for DHCP below?
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
Try to restart the networking service with:
sudo service network-manager stop
If it doesn't work, then try:
sudo service network-manager stop
Then the following command to bring up the interface:
sudo ifconfig eth0 up
Then, force Ubuntu to ask for a new DHCP lease with:
sudo dhclient eth0