Possibly the most well-known Linux-based operating system is Ubuntu. Unquestionably, it’s among the most well-known.
Nazrul Hoda Nizami 
How to set the fastest Ubuntu download server
Ubuntu uses hundreds of millions of servers worldwide to deliver updates to its global user base. The operating system will automatically choose a server based on your current location, yet the nearest server may not give you the quickest or most reliable access. This article explains how to change the …