System Update and Java Installation

First you need to update your system, making sure that Ubuntu version 18.04 is installed

sudo apt-get update 

Install Java

sudo apt-get install default-jdk 

Update JAVA_HOME variable

First, you need to find the JAVA_HOME directory

update-alternatives --config java 

Copy the directory, and then enter the following:

nano /etc/environment 

This will give you the opportunity to open a file containing environment variables

Add JAVA_HOME

JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java"

Save and close the file, then reload the environment variables for them to take effect

source /etc/environment

After checking the accuracy of your work and that everything is correct, you can use the following command:

echo $JAVA_HOME 

Create a user to run the Tomcat web server

This user (special for this tutorial) will accept the name ‘tomcat’, but you can use any name for this user

groupadd tomcat
useradd -s /bin/false -g tomcat -d /opt/tomcat tomcat

Be sure to find out which version of Tomcat you will install. This is in this link, you can familiarize yourself with it

http://tomcat.apache.org/

Remember to choose to download with the .gz extension

Next, create a directory for Tomcat files

mkdir /opt/tomcat 

Download Tomcat

cd 
wget your-tomcat-link 

Unzip the files to the Tomcat folder

tar xvf apache-tomcat-8*tar.gz -C /opt/tomcat --strip-components=1

Also, you can press the “Tab” key after entering apache, since you only have one download in your folder. Make sure the folders have the correct permissions

cd /opt/
sudo chown -R tomcat tomcat/

JAVA_HOME Display the path again so you can copy it

nano /etc/systemd/system/tomcat.service 

Tomcat setup

In order to configure Tomcat you need to Copy and paste the settings below into the tomcat.service file that you just created. Edit the JAVA_HOME path to the one you copied. After that, save and close the file

[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

Environment=JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64/jre
Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

User=tomcat
Group=tomcat
UMask=0007
RestartSec=10
Restart=always

[Install]
WantedBy=multi-user.target

Reboot the SystemD daemon so that the added service settings are enabled

sudo systemctl daemon-reload

Now you can start Tomcat service

sudo systemctl start tomcat 

If you want to check the status of your Tomcat server, need to add this сommand:

sudo systemctl status tomcat 

You can also see your Tomcat service page by clicking on the link:

http://your_ip_address:8080