Oracle 19c
We can see the exact minimum OS and kernel version requirements in the Database Installation Guide for Linux for Oracle 19c.
Please ref the Operating System Checklist for Oracle Database Installation on Linux:
Operating System Checklist for Oracle Database Installation on Linux
Oracle Linux 7.4 with the Unbreakable Enterprise Kernel 4: 4.1.12-112.16.7.el7uek.x86_64 or later
Oracle Linux 7.4 with the Unbreakable Enterprise Kernel 5: 4.14.35-1818.1.6.el7uek.x86_64 or later
Oracle Linux 7.4 with the Red Hat Compatible kernel: 3.10.0-693.5.2.0.1.el7.x86_64 or later
Red Hat Enterprise Linux 7.4: 3.10.0-693.5.2.0.1.el7.x86_64 or later
SUSE Linux Enterprise Server 12 SP3: 4.4.103-92.56-default or later
Attention: There is no support of Oracle 19c on OL6 or RHEL6!
Both, OL6 and RHEL6 got released a long time ago. RHEL6 is available since November 2010, OL6 since February 2011.
Oracle Database 19c New features
Automatic Indexing
Active Standby DML Redirect
Hybrid Partitioned Tables
JSON Enhancements
Memoptimized Rowstore
Quarantine SQL Statements
Real Time Statistics
Have a good work&life! 2019/02 via LinHong