Install Tomcat 7 on Ubuntu Server 16.04

apt-get update
apt-get install openjdk-8-jdk -y
useradd -s /bin/false -g tomcat -d /opt/tomcat-7.0.75
curl -O http://apache.mirrors.ionfish.org/tomcat/tomcat-7/v7.0.75/bin/apache-tomcat-7.0.75.tar.gz
mkdir /opt/tomcat-7.0.75
tar xzvf apache-tomcat-7.0.75.tar.gz -C /opt/tomcat-7.0.75 --strip-components=1
cd /opt/tomcat-7.0.75
chgrp -R tomcat /opt/tomcat-7.0.75
chmod -R g+r conf
chmod g+x conf
chown -R tomcat webapps/ work/ temp/ logs/
update-java-alternatives -l
java-1.8.0-openjdk-amd64       1081       /usr/lib/jvm/java-1.8.0-openjdk-amd64

nano /etc/systemd/system/tomcat.service
-----------------------------------------------------------------------------------------------------------
[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-7.0.75/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat-7.0.75
Environment=CATALINA_BASE=/opt/tomcat-7.0.75
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat-7.0.75/bin/startup.sh
ExecStop=/opt/tomcat-7.0.75/shutdown.sh

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

[Install]
WantedBy=multi-user.target
-----------------------------------------------------------------------------------------------------------

systemctl daemon-reload
systemctl start tomcat
systemctl status tomcat
ufw allow 8080

Open URL in web browser
http://localhost:8080