centos.sh

##
# Install JAVA
#
yum -y update
yum -y install java-1.8.0-openjdk

java -version

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_6.x86_64/jre/bin/java

#Source .bash_profile

echo $JAVA_HOME

##
# Install tomcat
# https://www.digitalocean.com/community/tutorials/how-to-install-apache-tomcat-8-on-centos-7
#
sudo groupadd tomcat
sudo useradd -M -s /bin/nologin -g tomcat -d /opt/tomcat tomcat
wget http://mirrors.estointernet.in/apache/tomcat/tomcat-9/v9.0.19/bin/apache-tomcat-9.0.19.tar.gz
sudo mkdir /opt/tomcat
sudo tar xvf apache-tomcat-9.0.19.tar.gz -C /opt/tomcat --strip-components=1
# sudo chown -R tomcat /opt/tomcat
sudo chgrp -R tomcat /opt/tomcat
sudo chmod -R g+r /opt/tomcat/conf
sudo chmod g+x /opt/tomcat/conf
sudo chown -R tomcat /opt/tomcat/webapps/ /opt/tomcat/work/ /opt/tomcat/temp/ /opt/tomcat/logs/

sudo cp tomcat.service /etc/systemd/system/tomcat.service
sudo systemctl daemon-reload
sudo systemctl enable tomcat
sudo systemctl start tomcat
sudo systemctl status tomcat

##
# Oracle Database 18c Express Edition (XE)
# https://www.oracle.com/technetwork/database/database-technologies/express-edition/downloads/index.html
# https://www.server-world.info/en/note?os=CentOS_7&p=oracle18c&f=6
#
wget https://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracle-database-preinstall-18c-1.0-1.el7.x86_64.rpm
yum -y localinstall oracle-database-preinstall-18c-1.0-1.el7.x86_64.rpm
/etc/init.d/oracle-xe-18c configure
systemctl start oracle-xe-18c
systemctl enable oracle-xe-18c

tomcat.service

# Systemd unit file for tomcat
[Unit]
Description=Apache Tomcat Web Application Container
After=syslog.target network.target

[Service]
Type=forking

Environment=JAVA_HOME=/usr/lib/jvm/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=/bin/kill -15 $MAINPID

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

[Install]
WantedBy=multi-user.target