How to select an update source for Ubuntu and an update source for Ubuntu

How to select an update source for Ubuntu and an update source for Ubuntu

Just installed Ubuntu, I decided to update the source first.

Although online search provides a lot of update sources, when the results are replaced with the actual use, it is found that there are always 404 unable to connect.

Later, I checked the information and found that Ubuntu provided a lot of source management.

The update method is as follows:

1. Open the software and updates in settings

2. Download from-> drop-down list

Click "select optimal server". The system will automatically test the optimal Server Source.

3. Update the system

After replacement, you can start updating the system.

Sudo apt-get update
Sudo apt-get upgrade
Sudo apt-get dist-upgrade