Ubuntu apt-get Update does not connect to the specified source

Problem Description: Ubuntu apt-get update does not connect to the specified source, modifies several software sources or is not connected, the same source of software can be used on other machines, and later found that each sudo apt-get update operation will be connected to the same IP : 118.244.213.6 reason: Find my native/etc/apt/directory by looking for more than one file apt.conf, the content is as follows: Acquire::http::p Roxy "http://118.244.213.6:3128/"; See this may be understood, all the requests to find this address, which may be my previous use of the Agent legacy solution: The solution is very simple, delete this file can be

Ubuntu apt-get Update does not connect to the specified source