how to install apache kafka on ubuntu 16?
['Step 1: Install Java.', 'Step 2: Install Zookeeper.', 'Step 3: Create a service user for Kafka.', 'Step 4: Installing Kafka.', 'Step 5: Configuring Kafka Server.', 'Step 6: Ensure Permission of Directories.', 'Step 7: Testing Installation.', 'Step 8: Launching Kafka as a Service on Startup.']