How to solve the problem after unable to connect to the network after reinstalling Linux

After reinstalling the Linux system, I suddenly found that I can't connect to the network. I believe that there are many friends who have encountered this problem. The following small series will introduce you how to solve the problem that the Linux system cannot connect to the network.

Actually, I didn't install the system myself before last week (but once I downloaded ubuntu12.04 to install it, it was in win7 environment, I forgot to double-click to install or use virtual machine at that time) Running the installation, anyway, it is as simple as installing any software or game. I don't think this is a real installation system. At this moment, I have not installed the windows system myself.

One day I felt that I had to reinstall the system. The reason was that I had installed a Rising star on my computer, and then I reported all kinds of anti-virus software. "There is a virus, be vigilant!" & rdquo;, the key is that I did not find Rising's uninstall program, use 360 ​​or Jinshan's software management tools to uninstall Rising, and then it gave me a warning that a malicious program intended to modify its flaws, and then Tell me that it has been blocked by it - -