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Administration is where IBM i earns its reputation for reliability. This guide groups the operations and system-management articles on AS400Decoded by responsibility, from work management to recovery planning.
Prefer a guided order? Follow the IBM i Administrator Roadmap on the IBM i Learning Paths page.
Operations Overview
- Operations and admin on IBM i: job queues, output queues, and keeping the system running
- IBM i System Operations with CL in 2026: Subsystem Management, Job Control, Data Queues, Output Queues, and Job Scheduling
Work Management: Jobs and Subsystems
- IBM i Subsystems and Job Descriptions Explained
- IBM i Work Management in Depth in 2026: Subsystem Design, Routing Entries, Job Queue Priorities, Class Objects, and Performance Diagnosis
- IBM i Job Scheduling and Batch Processing Explained
- IBM i Job Scheduling: ADDJOBSCDE, WRKJOBSCDE, IBM Advanced Job Scheduler, Notifications, and Batch Automation in 2026
Output Queues and Spooled Files
- IBM i Output Queues and Spool Files Explained
- IBM i Output Queue and Print Management: WRKOUTQ, CHGOUTQ, Spooled Files, CPYSPLF, SNDNETSPLF, PDF Conversion, and Printer Writers in 2026
Security
- IBM i Security Fundamentals and Best Practices
- IBM i Security in 2026: User Profiles, Object Authority, Adopted Authority, and Practical Security Patterns
- IBM i Security Hardening in 2026: QSECURITY Levels, User Profile Auditing, Special Authority, Network Security, and QSYS2 Security Views
- IBM i Security Auditing and Authority Collections
- IBM i IFS Permissions and Security: CHGAUT, CHGOWN, Access Control Lists, Symbolic Links, and QAUDJRN Auditing in 2026
Journaling
- IBM i Journaling and Commitment Control Explained
- IBM i Journal Management: STRJRNOBJ, Journal Receivers, DSPJRN, Remote Journaling, and the QAUDJRN Security Audit Journal on IBM i in 2026
Backup, Recovery, and High Availability
- IBM i Save and Restore: SAVOBJ, RSTOBJ, SAVLIB, SAVCHGOBJ, Save Files, and Backup Strategy in 2026
- IBM i High Availability and Disaster Recovery in 2026: Geographic Mirroring, Switchable ASPs, and HA Tools Compared
- IBM i IFS Advanced in 2026: Journalling Stream Files, NetServer SMB Shares, IFS Backup, Large Files, and CCSID Encoding
Performance and Monitoring
- IBM i Performance Tuning Basics
- Performance tuning on IBM i: finding bottlenecks and reading query plans
- IBM i Performance Tuning in 2026: Memory Pools, Reading WRKACTJOB, Collection Services, and Diagnosing Slow Batch Jobs
- IBM i Memory Pools and Pool Sizing: WRKSHRPOOL, Activity Levels, Automatic Performance Adjustment, and Paging Fault Diagnosis in 2026
- IBM i Observability in 2026: Collection Services, QSYS2 Health Queries, Structured Logging, and Prometheus Dashboards
System Operations and Maintenance
- IBM i System Startup and Shutdown Procedures in 2026: QSTRUP, STRTCP, STRSBS, ENDSBS, PWRDWNSYS, and IPL Modes
- IBM i PTF Management and Maintenance Planning
- IBM i PTF Management and OS Upgrades in 2026: Ordering Cumulative PTFs, Managing SF99xxx Groups, and Planning an OS Upgrade
- IBM i Release Upgrades and Compatibility Planning
- IBM i TCP/IP Configuration and Troubleshooting: CFGTCP, ADDTCPIFC, NETSTAT, PING, TRACEROUTE, DNS, Virtual Ethernet, and Line Descriptions in 2026
IBM i Operations Quick Reference
Lookup pages for command syntax, safe inspection, and operational triage.
Commands and Jobs
- IBM i Command Reference
- IBM i Job Commands Reference
- IBM i Library List Commands Reference
- IBM i Object and Library Commands Reference
- IBM i Spooled File and Output Queue Commands Reference
Messages and Troubleshooting
The full index is the IBM i Developer Reference.
Planned Topics
These topics are on the writing plan for this guide:
- Creating and managing user profiles
- System values every administrator should know
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