Ubuntu Mirror
Faster Ubuntu updates. Packages are downloaded from a server at TUKE instead of from abroad.
https://mirror.tuke.sk/ubuntu/
How to set it up?
sudo cp /etc/apt/sources.list.d/ubuntu.sources /etc/apt/sources.list.d/ubuntu.sources.bak
sudo sed -i -E 's#https?://([a-z]\.)?(archive|security)\.ubuntu\.com/ubuntu/?#https://mirror.tuke.sk/ubuntu/#g' /etc/apt/sources.list.d/ubuntu.sources
sudo apt update
sudo sed -i.bak -E 's#https?://([a-z]\.)?(archive|security)\.ubuntu\.com/ubuntu/?#https://mirror.tuke.sk/ubuntu/#g' /etc/apt/sources.list
sudo apt update
Only the Ubuntu archive address changes. Other sources (PPA, Docker) stay as they are.
Detailed guide on the wiki