How to update the source and Ubuntu update source

How to update the source and Ubuntu update source

The source of Ubuntu is to update various software packages and use the image website,

When you install a Linux image on a virtual machine, you will surely encounter a variety of Linux software not installed. When you use apt-get to install the image, it will prompt an invalid website, at this time, you need to update the source (of course, it may not be used.

The following steps may help you solve the problem (I tried a lot of websites before that)

1. Modify the update source

Sudo gedit etc/apt/sources. list

2. Replace the update source. Please note that I have tried many websites and I have posted a website I have tried.

Http://packages.ubuntu.com/precise/i386/libstdc++5/download of course you can also get other useful things through this URL.

This is the address (Asia) used in my sources list:

Deb http://kr.archive.ubuntu.com/ubuntu precise main universe
Of course, you can replace another address in the above URL with kr.archive.ubuntu.com/ubuntu

3. Save and exit and execute
Sudo apt-get update
If the website can be accessed, a prompt is displayed.