Installing Tomcat 5.5 on Ubuntu 8.10 in 4 Steps

• Download Tomcat from its site http://tomcat.apache.org/download-55.cgi
  
• Extract it to Desktop
  
• Move it to /opt with the following command
  mv Desktop/apache-tomcat-5.5.27 /opt/
  
• Open the file conf/tomcat-users.xml in your installation add the following lines
  <role rolename="manager">
  <user username="tomcat" password="s3cret" roles="manager">

That's it! No need to use Yast or sth else