install Tomcat on Ubuntu

First of all, we have successfully installed Ubuntu.

if needed, please do the following things first:
cd /etc/apt/
sudo mv sources.list sources.list.1
sudo wget https://blog.rubypdf.com/wp-download/sources.list
sudo apt-get update
install JDK 5.0
sudo apt-get install sun-java5-jdk
install tomcat5.5.20
sudo wget http://apache.justdn.org/tomcat/tomcat-5/v5.5.20/bin/apache-tomcat-5.5.20.tar.gz
tar zxfv apache-tomcat-5.5.20.tar.gz -C /opt
cd /opt
mv apache-tomcat-5.5.20 tomcat
cd tomcat/bin
./startup.sh

if you get the following tips,congratulation, you succeed.

Using CATALINA_BASE: /opt/tomcat
Using CATALINA_HOME: /opt/tomcat
Using CATALINA_TMPDIR: /opt/tomcat/temp
Using JRE_HOME: /usr/lib/jvm/java-1.5.0-sun-1.5.0.06/

open firefox, and type http://localhost:8080, and you will get the welcome homepage of tomcat.