Updating ubuntu 11 04 to 11 10
Oracle Java 12 downloads are still public, but probably that's probably going to change with future updates.
One way around this for users would be to create an Oracle account, download the latest Oracle Java version, and use a script like that makes it possible to install any Oracle Java version on Ubuntu, Debian and Fedora.
Install the "4.1.x" lts/bone kernel: Board Ubuntu#Mainline_.28lts.29 Build SGX userspace for 4.1.x (must be done on an x86, due to the TI 5. blob extractor) On the Beagleboard you should expect to require a swap file given the limitation of how little RAM is available (between 256 MB and 512 MB).
If you are using the "oracle-java12-installer" (or older) on Debian/Ubuntu, you must remove the "oracle-java12-installer-set-default" package to get Zulu Open JDK to be the default system Java.
The Zulu Open JDK packages do not include desktop integration, so you won't find any Open JDK desktop files in your application menu, or have the option of opening some JAR file from the file manager with Zulu Open JDK.
Zulu Open JDK 12, 11, 8 or 7 builds for Windows, mac OS and Linux can be downloaded from this page.
On Linux there are binaries available as DEB, RPM and gz (64bit).