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All commands set a status value upon exit which may be tested to see if the command completed normally. Traditionally, the value 0 signifies successful completion of the command, while a value >0 indicates an error. Some commands attempt to describe the nature of the failure by using exit codes as defined in sysexits(3), while others simply set the status to an arbitrary value >0 (typically 1).
Tutorials in the UNIX User's Manual Supplementary Documents.
| INTRO (1) | October 21, 2001 |
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| “ | A UNIX saleslady, Lenore, Enjoys work, but she likes the beach more. She found a good way To combine work and play: She sells C shells by the seashore. |
” |