Tomcat Installation on CentOS 6
Written by Jennifer Young on July 11, 2019. Last modified on February 20, 2020
The Tomcat server runs on n-9-22 on port 5020. (July 09 2020)
How to Restart the TomCat Server
Login to n-9-22 as root and run the screen called tomcat. You don't need to be in a screen to run this command, but I have the screen just to keep the tomcat commands in one place.
To restart, use
service tomcat9 restart
To start and stop separately, use
service tomcat9 start
service tomcat9 stop
What if n-9-22 is restarted / rebooted?
Tomcat should automatically start up whenever n-9-22 reboots. To check if tomcat is running, you can use
ps -ef | grep tomcat
Tomcat Instance 1
su - tomcat cd ../tomcat_instance_1/bin ./startup.sh
Where to get information if the server is currently running?
The Tomcat server runs on n-9-22 on port 8080. If the server is currently running, you can access the Tomcat GUI with links to the official documentation for the currently installed version and links to the manager app and more at the following link:
Since this link is on the private network, you must be logged in using the SSH tunnel to access it.
From here you can click the button Manager App to access the manager page, or simply go to
The user name is admin. The password is the usual password. This page allows you to start and stop applications individually and deploy new applications.
For more detailed information about Tomcat, the official documentation for the currently installed version is available here:
If the server, is offline, look for the documentation for Tomcat 9.0.17. This was the most recent version of Tomcat at the time of installation.
The current public version of SmallWorld is
Click the stop button to stop SmallWorld and the start button to start it. Do not click undeploy unless you want to start SmallWorld with new source in the form of a new .war file.
Install and Set Up on TomCat
Step 1: Check the CentOS version and Java version
SmallWorld currently runs on n-9-22, which runs CentOS 6.10. You can check the version of CentOS with the following command:
Check your current version of Java with the following command:
If you do not have the correct version, install it using yum. Follow the steps on this tutorial https://www.itzgeek.com/how-tos/linux/centos-how-tos/install-apache-tomcat-7-0-on-rhel-6-centos-6.html
Step 2: Create Tomcat Service Account
This must be done as a root user and has already been done for n-9-22.
groupadd tomcat mkdir /opt/tomcat useradd -g tomcat -d /opt/tomcat tomcat
Step 3: Create Initialization Script to Control Apache TomCat
Download the latest version of Apache TomCat from the website https://tomcat.apache.org/download-90.cgi
Copy the bash script from here https://www.itzgeek.com/how-tos/linux/centos-how-tos/install-apache-tomcat-7-0-on-rhel-6-centos-6.html