Installing Apache Tomcat

Follow these steps to download and then install Apache Tomcat server on your Ubuntu machine:

1. Move to the /tmp directory and download the Tomcat application using the wget command, as shown here:

        cd /tmp
        wget https://archive.apache.org/dist/tomcat/tomcat-8/ \
        v8.5.16/bin/apache-tomcat-8.5.16.tar.gz

To get a complete list of Apache Tomcat versions visit: https://archive.apache.org/dist/tomcat/.

1. Create a directory called /opt/tomcat using the following command:

        sudo mkdir /opt/tomcat 

1. Untar the content of the archive inside /opt/tomcat:

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

1. Next, create a systemd service file using the following command:

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

1. Paste the following content into 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                     
        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 
 
        RestartSec=10 
        Restart=always 
 
        [Install] 
        WantedBy=multi-user.target 

1. Type Ctrl + X and choose Y to save and close the file.
2. Next, reload the systemd daemon using the following command:

        sudo systemctl daemon-reload 

1. Start the Tomcat service using the following command:

        sudo systemctl start tomcat 

1. To check the status of Tomcat service, run the following command:

        sudo systemctl status tomcat  

1. You should see the following output:

        ● tomcat.service - Apache Tomcat Web Application Container 
          Loaded: loaded (/etc/systemd/system/tomcat.service; disabled;
          vendor preset: enabled) 
          Active: active (running) since Mon 2017-07-31 21:27:39 UTC;
          5s ago 
          Process: 6438 ExecStart=/opt/tomcat/bin/startup.sh (code=exited,
          status=0/SUCCESS) 
         Main PID: 6448 (java) 
            Tasks: 44 
           Memory: 132.2M 
              CPU: 2.013s 
           CGroup: /system.slice/tomcat.service 
                   └─6448 /usr/lib/jvm/java-1.8.0-openjdk-amd64/bin/java
       -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties
       -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogMan