I installed Ubuntu 12.04 to virtual machine. I have edited /etc/network/interfaces like this:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
Then I created a livecd.iso using relinux. Network interfaces is changing after boot from DVD (livecd.iso).
/etc/network/interfaces after boot from DVD:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
auto wlan0
iface wlan0 inet dhcp
auto eth1
iface eth1 inet dhcp
auto wlan1
iface wlan1 inet dhcp
But It is changing different if I boot livecd.iso via NFS.
/etc/network/interfaces after boot via NFS(Network File System):
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
auto wlan0
iface wlan0 inet manual
auto eth1
iface eth1 inet manual
auto wlan1
iface wlan1 inet manual
I'm really confused. What is changing the network interfaces? How can I prevent the changes?
Note: After some research, someone pointed me `/etc/udev/rules.d/70-persistent-net.rules file. It was empty. I removed it and created livecd.iso again but same things happened.
