Trying to Install Packages

[Mike]

First, a warning. I am a newbie!

I just installed Ubuntu 6.06 and I am trying to install Tomcat. I am able to
ping yahoo.com so I know that I am gtting outside. Yet whenever I execute
apt-get it never works.

As an example:

apt-get install tomcat5-admin
Reading package lists... Done
Building dependency tree... Done
E: Couldn't find package tomcat5-admin


I got the name tomcat5-admin from the Dapper list. Is theresomething special
that I need to do to get that package?

Thanks for your hlp.

Mike