In this article, we will have explained the necessary steps to install and configure Apache Tomcat on Ubuntu 18.04 LTS. Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges. All the commands in this tutorial should be run as a non-root user.
Apache Tomcat is an opensource web server used to server Java Applications. It is an opensource implementation of Java Servlet, Java Server Pages and Java Expression Language. It is one of the most widely adopted applications and web servers in the world today. Tomcat is simple to use and has a robust ecosystem of add-ons.
Install Apache Tomcat on Ubuntu
Step 1. First, before you start installing any package on your Ubuntu server, we always recommend making sure that all system packages are updated.
Step 2. Install Java with OpenJDK.
Tomcat requires Java to be installed. We’ll install OpenJDK, which is the default Java development and runtime in Ubuntu 18.04:
Step 3. Create Tomcat User.
Becuase of security reason Tomcat should not run as root user. So now you should create a non-root user for Tomcat typing following command:
Step 4. Install Tomcat.
We need to download latest binaries from Tomcat Download Page. At the time creating this tutorial latest version is 9.0.14. But you can use the latest stable version:
wgethttp://www-eu.apache.org/dist/tomcat/tomcat-9/v9.0.14/bin/apache-tomcat-9.0.14.tar.gz -P /tmp
Once the download is completed, extract the Tomcat archive and move it to the /opt/tomcat directory:
To have more control over Tomcat versions and updates, we will create a symbolic link latest which will point to the Tomcat installation directory:
Run following command to give installation directory ownership to tomcat user and tomcat group:
sudosh-c'chmod +x /opt/tomcat/latest/bin/*.sh'
Step 5. Create Systemd Unit File.
Run following command to create tomcat.service unit file inside /etc/systemd/system/ directory:
Environment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC"
Save and close the file and notify systemd that we created a new unit file:
Check the status if tomcat running using the following command:
Step 6. Update The Firewall Settings.
If your server is protected by a firewall and you want to access Tomcat interface from the outside of your local network you need to open port 8080:
Step 7. Configure Tomcat Web Management Interface.
Tomcat users and roles are defined in the tomcat-users.xml file. This file is a template with comments and examples describing how to configure the create a user or role:
Now add username and password for admin-gui and manager-gui. Make it sure you are setting strong username and password:
By default, Apache Tomcat restrict access to Manager and Host Manager apps to connections coming from the server also. You should remove these restrictions.
To change IP address restriction open following files. Open Manager app context file using below command:
Open Host Manager app context file using below command:
Add commnets as given in following file:
Remember to restart the Tomcat service each time you edit Tomcat configuration files for changes to take effect:
Step 8. Test the Tomcat Installation.
Open your browser and type: http://<your-domain_or_IP-address>:8080
You should get following output for successful installation:
Now use Manager App visiting http://YOUR-SERVER-DOMAIN_OR_IP-ADDRESS:8080/manager/html.
That’s all you need to do to install Apache Tomcat on Ubuntu 18.04. I hope you find this quick tip helpful. If you have questions or suggestions, feel free to leave a comment below.