DB2 Version Upgrade & Downgrade V11.1 to V11.5 on RHEL8.5

00:00 Overview
05:10 Install DB2 V11.5
10:27 Pre-checks
16:14 Upgrade to V11.5
21:43 Post-checks
26:03 Downgrade to V11.1
33:00 Upgrade using Backup & Restore