Ubuntu network configuration system sometimes does not work with a graphical interface, in which case you can modify some startup scripts or configuration files directly
Ubuntu system network configuration involves several configuration files
1./etc/network/interfaces 2./etc/resolv.conf
Manipulating the steps of:
1. Open the ubuntu / etc / network / interfaces file default as follows:
the car
iface lo inet loopback
To configure a dynamic acquisition:
auto eth0
iface eth0 inet dhcp
Statically allocated configuration:
auto eth0
iface eth0 inet static
address 192.168.0.1
netmask 255.255.255.0
gateway 192.168.0.1
The configuration requirements (automatically obtain or dynamically assigned) modify the configuration file is saved.
2. Add the domain name server: Open the file /etc/resolv.conf
Add this line: nameserver 202.99.166.4
3. Restart Network
$ / Etc / init.d / networking restart (this command is to restart the network card)
or
$ifdown eth0
$ Ifup eth0 (these two commands are targeted to restart a network interface, because a system may have multiple network interfaces)
4. View the parameters of the network configuration is not correct (once for each operation can view what is not modify the network configuration)
$ifconfig
5. See if it is able to ping
Description of ping nowhere Gateway network configuration problem not ping dns domain description in question
Sometimes you need to modify the hardware address of the network card:
method one:
$ifconfig eth0 hw ether XX:XX:XX:XX:XX:XX
$ / Etc / init.d / networking restart (reboot NIC)
Method Two:
These are just a temporary modification of the hardware address to be permanently modified, directly edit / etc / network / interfaces file, add a line at the back iface eth0 inet static: pre-up ifconfig eth0 hw ether xx: xx: xx: xx: xx: xx (to into the MAC)
$ Sudo /etc/init.d/networking restart (reboot NIC)
PS:
Instead of adding domain name server in /etc/resolv.conf, or add dns-nameserver xxx.xxx.xxx.xxx in the original / etc / network / interfaces. Because /etc/resolv.conf gone after the restart. And add in / etc / network / interfaces automatically dns server in /etc/resolv.conf of