What if Ubuntu doesn't even surf the internet?

Ubuntu notebook came to a local area network, plug in the network cable, network cable indicator light, but not even the Internet, click on the network connection icon, show "Network unmanaged." Suddenly think of this notebook before the set of PPPOE (wired broadband virtual dial-up), and then made a set of changes to finally solve the problem.

1, Ubuntu notebook came to a local area network, a bit Song. Plug in the network cable, network cable indicator light, but not even the Internet, click on the Internet connection icon, show "Network unmanaged." It suddenly occurred to me that the front of the notebook was set over PPPOE (wired broadband virtual dial), which was suspected to be the cause.

2. Press Ctrl + ALT + t to pull out the terminal.

3, type the command: Cd/etc/network, into the/etc/network directory, it has a file called interfaces.

4, and then type the command: sudo gedit interfaces, which means calling the Gedit text editor and opening interfaces this file.

The last line of this file is: iface eth0 inet Manual, meaning, eth0 this network interface (personal computer, eth0 generally refers to the only one network interface), need to set up the network manually.

5, however, the current LAN, is obviously a DHCP network, that is, access to the computer needs "automatic access network" address. We put an English "#" in front of this line of characters, "note" Out of this line, meaning not to manually set up the network, but instead to automatically set. Note that must be the "#" in English, otherwise the input of Chinese words, can not get the "annotation" function.

6, save the file, close the Gedit text editor, back to the terminal, type command: sudo service network-manager Restart, means to restart Network management services. Press Enter and the network is connected immediately. After leaving the LAN, you need to reuse virtual dialing, as long as the 4th, 5 steps of the method, the added "#" removed, and then restart the network management services, on the line.