Suppose you’re providing phone support to someone with little experience using the AIX command line. You ask them to enter a simple command such as “ls –l” and then tell you what displays. The message comes back: “ksh: ls-l: not found.” You might find it frustrating that the person on the other end of the phone missed the space in the command, but spare a thought for that user. After all, it’s not a very user-friendly message, is it? Perhaps it ...

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