After the debian upgrade, the NIC cannot be found.

After the debian upgrade, the network card cannot be found -- the Linux Release Technology-Debian information. The following is a detailed description. In fact, it is quite simple. Today, a large number of programs have been upgraded, and the network service is automatically stopped during the upgrade process. After the restart, it is found that the Internet connection is no longer available.

Ifconfig looked at it and the valid Nic device is eth0. It should be correct. I always use it, but the default IP address is 127.0.0.1, which is not configured.

Ifconfig eth0 inet up 192.168.0.111 \
Netmask 255.255.255.0 broadcast 192.168.0.255
Route add-net 10.0.0.0 netmask 255.0.0.0 gw 192.168.0.1 dev eth0

Or not.

Open/etc/interface and see that etc0 has been configured in the name.

When ifconfig-a accidentally saw eth1, it suddenly occurred that two Nic devices were added in gnome, and eth0 was replaced by eth1.

Modify etc/interface and change eth0 to eth1,

/Etc/init. d/networking restart

It's quite a small problem. The idea of first-in-first-class wastes a lot of time.