Tutorial on changing configuration source in ubantu.

To change the software source configuration on Ubuntu, you can follow these steps:

1. Back up the current software source configuration file (optional):

   • Execute the following command to back up the current software source configuration file:

     sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup

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2. Open the software source configuration file:

   • Use a text editor (such as nano or vi) to open the software source configuration file:

     sudo nano /etc/apt/sources.list

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3. Select the appropriate software source image:

   • In the opened file, different software source images will be listed.
   • Comment out the current software source image line, you can add
     in front of the line #character.
   • Add a new software source image below. You can choose the image suitable for your region from the Ubuntu official image list.

   • For example, for Ubuntu 20.04 version, you can use the following mirror source:

     deb 
     deb 
     deb 
     deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse

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4. Save and close the file:

   • Press
     in the text editor Ctrl X, then press
     YConfirm to save changes.

5. Update package list:

   • Execute the following command to update the software package list to make the new software source configuration take effect:

     sudo apt update

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Now, you have successfully changed Ubuntu’s software source configuration. By choosing an appropriate mirror source, you can improve the speed and stability of software package downloads. Remember to execute the
sudo apt update command regularly to get the latest package list.

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