Hi, I face upgrade problem. It waits for header long long time and not success in upgrade. It occured about 2 days ago and I tried many method found in google and not help. I also tried with different laptop and different network.
Please help
In Software & Updates, try switching to Main Server under "Download From".
Your local regional server may be down for the past couple of days.
I also selected the best server and not help
Where did you make this selection?
Instead of selecting "other" just select Main Server.
selected main server still got probem
I am on main server. I just ran sudo apt update and had no connection issues.
You might try
sudo apt --fix-missing
and see what output it yields.
Have you added any repositories recently?