systemctl-tomcat

- Install java

- sudo groupadd tomcat
- sudo useradd -M -s /sbin/nologin -g tomcat -d /opt/tomcat tomcat

- sudo mkdir /opt/tomcat
- sudo tar xvf apache-tomcat-8*tar.gz -C /opt/tomcat 
- cd /opt/tomcat
- Change permissions:
  sudo chgrp -R tomcat conf
  sudo chmod g+rwx conf
  sudo chmod g+r conf/*
  sudo chown -R tomcat webapps/ work/ temp/ logs/
  sudo chown -R tomcat webapps/ work/ temp/ logs/
  
- Install Systemd Unit File
  sudo vi /etc/systemd/system/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
  
  [Install]
  WantedBy=multi-user.target
  
  ##########################################################################################################
  
- sudo systemctl daemon-reload
- sudo systemctl start tomcat
- udo systemctl enable tomcat

- Check 
  systemctl list-units  | grep tomcat