What are my repos?? When I do dselect update I get the message that there's no space for memory left . Has anything else changed.I have been using

apt-cache search<package> not apt-cache policy, but when I type apt-cache policy it just says "unable to locate tomcat5"etc

What about installing cos when I do
apt-get install <package>
nothing happens for the packages I am looking for. I am confused because up until weekend I could get evrything but since thewn it all stopped.