Apt-Get Install Apache Tomcat 7 on Ubuntu 14.04

sudo apt-get update
sudo apt-get install tomcat7 tomcat7-docs tomcat7-admin tomcat7-examples

then type: http://your_ip_address:8080 in your browser, and you will see next screen-shot:

If you see “It works!” your tomcat successfully installed

Install Java Development Kit (Optional)

sudo apt-get install default-jdk

Configure Tomcat Web Management Interface

You must add users by editing /etc/tomcat7/tomcat-users.xml file.
Edit your tomcat-users.xml.
Make sure change password and username.

<tomcat-users>
        <role rolename="admin-gui"/>
        <user username="tomcat" password="s3cret" roles="admin-gui"/>

        <role rolename="manager-gui"/>
        <user username="tomcat1" password="s3cret" roles="manager-gui"/>
</tomcat-users>

Save file and restart tomcat service

sudo service tomcat7 restart