Install tomcat 8 on Ubuntu 18.04

 1. install jdk 8 or open jdk 8

2. create tomcat user account

sudo groupadd tomcat

3. run below command

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

4. move to tmp folder

5. run the below command to download tomcat tar file

wget ftp://apache.cs.utah.edu/apache.org/tomcat/tomcat-8/v8.5.68/bin/apache-tomcat-8.5.68.tar.gz
 

 

6. create folder on /opt/tomcat

cd /opt/

sudo mkdir /opt/tomcat

7. run below command - to extract tar file to /opt/tomcat

cd /tmp/

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

 8.tomcat extract to below folder

9.give the tomcat user control of the entire directory and make all the scripts in the bin location executable

 

sudo chown -R tomcat: /opt/tomcat
sudo sh -c 'chmod +x /opt/tomcat/bin/*.sh'

 10.run below command

sudo vi /opt/tomcat/conf/tomcat-users.xml

add the below lines

11. add below line to 

sudo vi /etc/systemd/system/tomcat.service

==============================

[Unit]
Description=Tomcat servlet container
After=network.target

[Service]
Type=forking

User=tomcat
Group=tomcat

Environment="JAVA_HOME=/usr/lib/jvm/default-java"
Environment="JAVA_OPTS=-Djava.security.egd=file:///dev/urandom"

Environment="CATALINA_BASE=/opt/tomcat"
Environment="CATALINA_HOME=/opt/tomcat"
Environment="CATALINA_PID=/opt/tomcat/temp/tomcat.pid"
Environment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC"

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

[Install]
WantedBy=multi-user.target

12. After that, run the commands below to reload systemd profiles and enable tomcat service

sudo systemctl daemon-reload 

--- not working below two line ---------- 

sudo systemctl start tomcat.service
sudo systemctl enable tomcat.service

13. run the tomcat using the below commands

sudo -s
cd /opt/tomcat/bin/ 

./startup.sh 

14. on the web browser run below command

http://localhost:8080