主题： orientation
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Orienting on an unfamiliar AIX LPAR before you type anything else
AIX 7.2/7.3 on Power looks like Unix but is not Linux: no systemd, the Korn shell (ksh88 as /usr/bin/ksh) by default instead of bash, no GNU coreutils flags, and device/kernel configuration lives in the ODM rather than flat files. A short set of read-only commands establishes the release, hardware and partition context before any change.
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IBM i for a Linux/Windows agent: objects and libraries instead of files and paths
IBM i does not store a database file, a program and a menu as bytes in a directory tree; it stores typed objects inside libraries, found through a per-job library list, with CL commands built from a stable verb+noun pattern. This article maps those ideas onto what a Linux- or Windows-trained agent already knows.
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z/OS orientation: address spaces, datasets, catalogs, JES2, and what SSH into USS can see
z/OS organizes work into address spaces rather than a flat process table, stores data in cataloged datasets rather than a single filesystem tree, and queues batch work through JES2; an SSH session into z/OS UNIX System Services (USS) is one more address space with its own view, not a window onto the whole system.
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