Solution to Ubuntu not being able to connect to the Internet

Problem description:

I used a desktop computer and the campus network to access the Internet via wired mode. I tested 64-bit Ubuntu 14.04.4, Ubuntu 14.04.5, and Ubuntu 16.04.3, and all of them had the following problems:

The network shows that it is connected, but it cannot access the Internet:

This situation often occurs in some occasions where you need to log in to the Internet, such as schools. Of course, if this error occurs when you do not want to log in to the network, you can also try the following solutions:

1. Click the edit connection in the above picture and set the static IP, as shown in the figure below:

2. Press Ctrl+Alt+T to open the terminal and configure DNS as follows:

(1) sudo nano /etc/network/interfaces and add dns-nameserver 114.114.114.114 at the end

(2) sudo nano /etc/resolvconf/resolv.conf.d/base and add nameserver 114.114.114.114 at the end

(3) sudo nano /etc/resolv.conf and add nameserver 114.114.114.114 at the end

3. Restart the network and the problem is solved! ! ! !

sudo service networking restart

explain:

DNS stands for Domain Name System, and its function is to convert domain names into specific IP addresses.

Commonly used DNS:

• 8.8.8.8——The IP address of the free DNS server provided by Google (if we want to access Google, we can consider changing the DNS to 8.8.8.8, hehe)
• 114.114.114.114——DNS commonly used by domestic users to access the Internet
• 223.5.5.5——AliDNS. Ali Public DNS is a DNS recursive resolution system launched by Alibaba Group. Its goal is to become an integral part of the domestic Internet infrastructure and provide "fast", "stable" and "intelligent" free DNS recursive resolution services to Internet users.

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.