Oracle Database 19c (19.3.0) for Linux is available for download as of now from OTN and eDelivery. For those of you who started with Oracle Database 19.2 already, the Updates (RU) 19.3.0 for the database and GI are available as well for Linux and Solaris.
Oracle Database 19c on premises for Linux
You can download Oracle Database 19.3.0 on-prem for Linux now from the usual sources:
The download offering includes the zip, the RPM for the database, and Grid Infrastructure, the Client and more.
The other ports will follow soon.
Oracle 19c Documentation
And of course you can access the Oracle 19c Documentation from now on as well:
Oracle Database 19c Patches
In case you started already with Oracle Database 19.2, you can now download the Update 19.3.0 on Linux and Solaris as well. Use MOS Note:2118136.2 (Assistant: Download Reference for Oracle Database/GI Update, Revision, PSU, SPU(CPU), Bundle Patches, Patchsets and Base Releases) and choose “Updates”: