IBM i Knowledge Center: 7.5

Official Documentation for IBM i 7.5, where you can find information about how to install, maintain, and use the IBM i.  7.5 is the current release, delivered in 2022.

PUB400.COM

PUB400.COM provides free access to an IBM i 7.5 partition for educational purposes. Anyone can request a user profile for access. You can use this partition to improve your IBM i skills in general, program in CL, RPG, COBOL, and SQL, and learn web technologies.

Getting Started with Db2 Mirror for i

This IBM Redpaper publication provides a broad overview and understanding of Db2 Mirror for i by covering its architecture, positioning, planning, and implementation aspects.