Sometimes my desktop (Ubuntu 10) doesn't recognize the eth0 interface. An ifconfig will answer only with the lo interface Direc. inet:127.0.0.1 Másc:255.0.0.0, and, when this happens I can't access to the network.
At this point the /etc/network/interfaces file looks like
iface lo inet loopback
So I have to switch to a fixed IP address in the /etc/network/interfaces file
iface eth0 inet static
Then I restar the networking service and get the following message, even when network starts working again and an ifconfig answers with both interfaces lo and eth0.
* Reconfiguring network interfaces...
ssh start/running, process 1570
postconf: fatal: open /etc/postfix/main.cf: No such file or directory
Why does this fatal error apears? Thank in advance.