Hi jlopezza,
The All-in-One installer contains DB2 11.5. Thus, it runs only on Red Hat Enterprise Linux 7.5 or a higher 7.x version. The All-in-One installer will be probably updated in a later stage.
I have installed ILMT 9.2.22 with DB2 11.5.5.0 and BigFix 10.0.2 at RHEL 8.3 with separate installers. DB2 11.5.5.0 is supported for RHEL 8.1+
Referring to:
https://www.ibm.com/support/knowledgecenter/SS8JFY_9.2.0/com.ibm.lmt.doc/Inventory/planinconf/t_aio_downloading_installer.html#task_o21_4q1_dy
Kind regards, Tillo Vogel
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