Resolv. conf cleared after Ubuntu 12.04 is restarted

Resolv after Ubuntu 12.04 is restarted. conf Clearing Problem 1./etc/resolv. conf is actually a Link. It actually points to/run/resolvconf/resolv. conf 2. Ubuntu has a resolvconf service. If you restart it,/etc/resolv. the conf content will be changed to the default format, so you cannot directly modify/etc/resolv. conf 3. If you want to define your own nameserver, you can add the following two methods: A. In the NIC configuration file: iface eth0 inet static address 192.168.3.3 netmask 255.255.255.0 gateway 192.168.3.1 dns-nameservers 192.168.3.45 192.168.8.10 dns-search foo.org bar.com B. Modify the resolvconf service configuration file:/etc/resolvconf/resolv. conf. d/base