How to Set Up a Wireless Ubuntu Server on Raspberry Pi

New: this article has been updated to support Ubuntu 21.04 Hirsute Hippo!

No LAN cable is required. Use any power outlet within the radius of your WiFi router! The 5GHz ac standard for Raspberry Pi 4 also covered.

Prerequisites

If you are looking for an elegant solution, I suggest investing in a capacious microSD card. A…