How to Fix 'Failed to Download Package Files, Check your internet Connection' on Ubuntu 18.04 LTS?

Step 1: Click on 'show applications' at the bottom left, and then do a search for 'Software and Updates'. Click on it to open it.

Step 2: Under 'Ubuntu Software' Tab, Click on dropdown next to 'Ubuntu Software', and then select 'Main Server'.

Step 3: Provide your Administrative Password, and then click on 'Authenticate' button. Click on 'close' button.

Step 4: Click on 'Reload' button. It will update cache.

Step 5: Now, again open 'software updater'. you will not get that error.

It's done


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