Install tomcat 7 manually in ubuntu and integrate with eclipse

1. Download Tomcat 7 tar.gz
2. Run the following commands

cd /path/to/downloaded/file
tar xvzf apache-tomcat-7.0.52.tar.gz
sudo mv apache-tomcat-7.0.52/ /usr/share/tomcat7
sudo gedit /usr/share/tomcat7/bin/catalina.sh

3. Add following two lines after the first line and close gedit after saving the changes

JAVA_HOME="/usr/lib/jvm/java-6-openjdk-i386"
JRE_HOME="/usr/lib/jvm/java-6-openjdk-i386/jre"

4. To integrate with eclipse

cd /usr/share/tomcat7
sudo ln -s /var/lib/tomcat7/conf conf
sudo ln -s /etc/tomcat7/policy.d/03catalina.policy conf/catalina.policy
sudo ln -s /var/log/tomcat7 log
sudo chmod -R 777 /usr/share/tomcat7/conf

5. Start the Tomcat server using following command to check if it is working

sudo /usr/share/tomcat7/bin/catalina.sh run

6. Stop the server by pressing ctrl+c
7. To change the port number, open server.xml in gedit

sudo gedit /usr/share/tomcat7/conf/server.xml

8. Change all the occurrences of <connector port="8080"> to <connector port="8081">
9. Verify installation at: http://localhost:8081/