Yesterday at the regional Oracle Cloud World (OCW) in Singapore it got announced: Oracle Database 23c Free Developer Release is available for download from now on.
Where can you download it?
That is most likely the most important link you are looking for. You can download the Oracle Database 23c Free Developer Release from here: Download Oracle Database 23c Free Developer Release. You will download an RPM.
Please note that Oracle Database 23c on Linux requires your OS to be either OL8 or RHEL8.
You can find the preinstall package here:
And my colleague Gerald Venzl