I'm having some troubles installing applications, e.g. jdk, anaconda, IDE and everything else in my Ubuntu.
After I download these programs from the website in tar.gz format, when I extract these files, they are still in the Downloads directory.
Some of the files downloaded from Ubuntu Software or apt-get are automatically installed and well distributed in directories owned by root, not my user, e.g. npm downloaded from apt-get is in /usr/bin/.
But if I download just like in Windows, directly through the official site (like Oracle, JetBrains, Anaconda) they remain in the Downloads directory even after I extract and install.
How can I download applications on system-level (or root-level, not user) and make them properly-distributed?