To increase CPU usage for testing in an AWS Ubuntu instance, we can generate artificial load on the CPU using tools like stress, stress-ng, or custom scripts.
Using stress: Install stress and generate CPU load using 'stress --cpu 4 --timeout 60'.
Using stress-ng: Install stress-ng and generate CPU load using 'stress-ng --cpu 4 --cpu-load 80 --timeout 60s'.
Using a Custom Script: Create a bash script and execute it to load the CPU.