1: Install TOMCAT on linux box

Step #1: Install Tomcat

1.1 Create a Linux machine // Ubuntu 20.X

Prereq: Install JAVA

1.2: down load the package --> google doneload Apache Tomcat --> Version 8

Copy the link address

cd /opt

wget https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.81/bin/apache-tomcat-8.5.81.tar.gz

tar xzvf apache-tomcat-8.5.81.tar.gz

mv apache-tomcat-8.5.81 tomcat

cd tomcat

cd bin/

./startup.sh ---> Tomcat started.

Enabling remote access

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cd /opt/tomcat

find / -name context.xml

/opt/tomcat/webapps/manager/META-INF/context.xml

/opt/tomcat/webapps/host-manager/META-INF/context.xml

Backup of the Orignal files:

cp -p /opt/tomcat/webapps/manager/META-INF/context.xml /opt/tomcat/webapps/manager/META-INF/context.xml_ORIG

cp -p /opt/tomcat/webapps/host-manager/META-INF/context.xml /opt/tomcat/webapps/host-manager/META-INF/context.xml_ORIG

vi /opt/tomcat/webapps/manager/META-INF/context.xml

vi /opt/tomcat/webapps/host-manager/META-INF/context.xml

Comment the below line over both the files:

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<!-- <Valve className="org.apache.catalina.valves.RemoteAddrValve"

allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" /> -->

Restarted Tomcat:

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cd /opt/tomcat/bin

./shutdown.sh

./startup.sh

Create users:

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

Addd these Roles and users at the end of the file:

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<role rolename="manager-gui" />

<role rolename="manager-script" />

<role rolename="manager-jmx" />

<role rolename="manager-status" />

<user username="admin" password="admin" roles="manager-gui, manager-script, manager-jmx, manager-status" />

<user username="deployer" password="deployer" roles="manager-script" />

<user username="tomcat" password="s3cert" roles="manager-gui" />

Restarted Tomcat:

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cd /opt/tomcat/bin

./shutdown.sh

./startup.sh