When installed out of the box, Tomcat includes a variety of sample applications. These are actually quite useful to people learning how to write JavaServer pages and servlets (look inside the CATALINA_HOME/weabpps and the CATALINA_HOME/conf/Catalina/localhost directories to see what webapps are already present in a fresh installation of Tomcat).

Because these examples are so helpful, you may wish to keep them deployed so you can learn from them; on the other hand, you may not want somebody else's examples showing up on your production web server. In that case, you should remove the example webapps from the CATALINA_HOME/webapps/ directory. One way of doing that is to just move them to a different directory, like this:

# cd $CATALINA_HOME
# mkdir moved-webapps
# mv webapps/*
moved-webapps/

Then, restart Tomcat to put these changes into effect.