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Apache Tomcat Installation on Linux AWS EC2 (2025): Step-by-Step Guide on Ubuntu Apache Tomcat Installation on Linux AWS EC2 (2025) This guide explains how to install Java, set up Apache Tomcat 9, configure a custom port, and verify the installation step by step on an Ubuntu-based AWS EC2 instance. Table of Contents Environment Details Connect to EC2 Instance Update System Packages Install Java (OpenJDK 11) Create Dedicated Tomcat User Download Apache Tomcat 9 Extract Tomcat to /opt Configure Custom Tomcat Port Create systemd Service Verify Tomcat Service Check Tomcat Version AWS Security Group Configuration Access Tomcat in Browser Access Tomcat Manager GUI Notes on /docs 403 Error Final Outcome 1. Environment Details Cloud: AWS EC2 (Free Tier) Operating System: Ubuntu Server Java Version: OpenJDK 11 Tomcat Version: Apache Tomcat 9.0.89 Custom Port: 8090 Access: SSH using PEM key 2. Connect to EC2 Instance Connect to t...