I\'m looking for advice on a really small linux distro that I can run inside VirtualBox without killing the host system and that can also run the latest Sun/Oracle-Java. I don\'
If you're happy with making all the settings yourself, and you genuinely only need those two packages, I'd recommend SliTaz. It's a tiny distro, only about 30 MB on the ISO and ~100 MB installed, and still has a GUI available. With Java and PostgreSQL installed, it only takes up ~430 MB, if you remove the setup files. I got both Java and PostgreSQL working in about 15 minutes. Just a note, you need to install the Oracle JDK from their website, and not the package manager's version, as that is OpenJDK or somesuch.