I put the package sun-java6-jdk on Ubuntu
sudo apt-get install sun-java6-jdk
and get an error.
The sun-java6-jdk package is not available, but is listed in the dependency list of another package. This may mean that the package is missing, outdated, or available from sources not mentioned in sources.list
E: No installation candidate found for sun-java6-jdk
What repositories need to connect?