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Korn Shell 93 Auditing and Accounting

Korn Shell 93 (ksh93) is the only UNIX or GNU/Linux shell that I am aware of that, with proper setup, supports a modicum of per-user accounting and auditing. This post attempts to explain these facilities and show you how to access and manipulate the resulting accounting and auditing records. Per-user accounting has been a feature of ksh93 since the earliest days of this shell. It is a fairly primitive facility which writes out an (undocumented) record for each user command that is executed. An auditing facility was added in July 2008. This is somewhat more sophisticated than the accounting facility