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Installing Apache Tomcat on Ubuntu 18.04
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Apache Tomcat is an open-source software implementation of the Java Servlet and Java Server Pages technologies. With this guide, you’ll run applications within Tomcat using the OpenJDK implementation of the Java development environment.
Before You Begin
Ensure that your system is up to date and that you have completed the Setting Up and Securing a Compute Instance . If you are new to Linux server administration, we recommend reviewing our beginner’s guide and the article concerning systems administration basics .
Make sure you’ve followed our instructions for setting your hostname . Issue the following commands to make sure it is set properly:
hostname hostname -f
The first command should show your short hostname, and the second should show your fully qualified domain name (FQDN).
You should also make sure your system is up to date. Enter the following command and install any available updates:
apt-get update && apt-get upgrade
root
or with the sudo prefix. For more information on privileges see our Users and Groups
guide.Install Apache Tomcat
Install Tomcat from the Ubuntu repository:
sudo apt-get install tomcat9
Note OpenJDK will be installed as a dependency when you install thetomcat9
package. The packageopenjdk-11-jre-headless
is included with thedefault-jre-headless
metapackage in Ubuntu.You may also want to install the
tomcat9-docs
,tomcat9-examples
, andtomcat9-admin
tools which provide web-based applications that document, test, and allow you to administer Tomcat. You can install all three with the following command:sudo apt-get install tomcat9-docs tomcat9-examples tomcat9-admin
Start the Tomcat service.
sudo systemctl start tomcat9
If you need to stop or restart Tomcat you can use the following commands, respectively:
sudo systemctl stop tomcat9 sudo systemctl restart tomcat9
Test and Use Tomcat
You can test your Tomcat installation by pointing your browser at your domain name, specifying port 8080
. For example, you might use http://example.com:8080/
, replacing example.com
with your domain name. Note that Tomcat listens on network port 8080 and does not accept forced HTTPS connections by default. By default, Tomcat configuration files are located in the /var/lib/tomcat9/conf
directory.
Configure tomcat9-admin (optional)
If you installed the tomcat9-admin
web application above, you can configure it by adding the following lines to the end of your /var/lib/tomcat9/conf/tomcat-users.xml
file before the </tomcat-users>
line, substituting your own username and secure password. If using Tomcat Admin, include both the “manager-gui” role for the manager and the “admin-gui” role for the host-manager application.
- File: /var/lib/tomcat9/conf/tomcat-users.xml
1 2 3
<role rolename="manager-gui"/> <role rolename="admin-gui"/> <user username="username" password="password" roles="manager-gui,admin-gui"/>
Restart the Tomcat server, which will allow these changes to take effect:
sudo systemctl restart tomcat9
More Information
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
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