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1.1 ! root 1: .TH INTRO 1 ! 2: .SH NAME ! 3: intro \- introduction to commands ! 4: .SH DESCRIPTION ! 5: This section describes publicly accessible commands ! 6: in alphabetic order. ! 7: .PP ! 8: The name of a particular machine at the head of the ! 9: page means that the command lives there and not necessarily ! 10: elsewhere. ! 11: `Local' means the same, without being specific about where. ! 12: .SH SEE ALSO ! 13: Section (7) for databases. ! 14: .br ! 15: Section (8) for `hidden' commands for booting, maintenance, etc. ! 16: .br ! 17: Section (9) for commands that involve the Teletype 5620 terminal. ! 18: .br ! 19: .I How to get started, ! 20: in the Introduction. ! 21: .SH DIAGNOSTICS ! 22: Upon termination each command returns two bytes of status, ! 23: one supplied by the system giving the cause for ! 24: termination, and (in the case of `normal' termination) ! 25: one supplied by the program; ! 26: see ! 27: .IR exit (2). ! 28: The former byte is 0 for normal termination, the latter ! 29: is customarily 0 for successful execution, nonzero ! 30: to indicate troubles such as erroneous parameters, bad or inaccessible data, ! 31: or other inability to cope with the task at hand. ! 32: It is called variously `exit code', `exit status' or ! 33: `return code', and is described only where special ! 34: conventions are involved.
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