How to Overcome Error When "sudo apt update" on Ubuntu | Ubuntu tutorials
If you experience problems or errors when running the command "sudo apt update" or "sudo apt-get update" in the terminal on your Ubuntu and want to overcome this so that you can update again as before, then you can follow the steps below:
1. After running the terminal and finding an error message, you first check the cause of the error. Usually errors appear caused by packages from applications that fail to install.
2. If you have found an error package, you open the "Software & Updates" application on the Show Applications menu,
3. Select the "Other Software" tab,
4. Find the package from the application that had the error earlier by scrolling down until you find the package,
5. If you have found the application package with the error, first remove the blue tick in the column to the left of the package,
6. Then click the Close button, after that click the Reload button,
7. Done.