When I was trying to add Tomcat 6 on Eclipse’s server list I got the following error message,

Cannot create a server using the selected type

The fix is as follows,

sudo apt-get install tomcat6
cd /usr/share/tomcat6
sudo ln -s /var/lib/tomcat6/conf conf
sudo ln -s /etc/tomcat6/policy.d/03catalina.policy conf/catalina.policy
sudo ln -s /var/log/tomcat6 log
sudo chmod -R 777 /usr/share/tomcat6/conf

This links all the files which are all over the place to /usr/share/tomcat6, which is awesome

Sources:

http://ubuntuforums.org/showthread.php?p=8541057 and

http://www.coderanch.com/t/426312/Linux-UNIX/running-Tomcat-with-eclipse-Ubuntu