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INTRO(1)                FreeBSD General Commands Manual               INTRO(1)

NAME
       intro - introduction to commands

DESCRIPTION
       This section describes publicly accessible commands in alphabetic
       order.  Certain distinctions of purpose are made in the headings:

       (1)    Commands of general utility.

       (1C)   Commands for communication with other systems.

       (1G)   Commands used primarily for graphics and computer-aided design.

       (1M)   Commands used primarily for system maintenance.

       The word `local' at the foot of a page means that the command is not
       intended for general distribution.

SEE ALSO
DIAGNOSTICS
       Section (6) for computer games.

       How to get started, in the Introduction.

DIAGNOSTICS
       Upon termination each command returns two bytes of status, one supplied
       by the system giving the cause for termination, and (in the case of
       `normal' termination) one supplied by the program, see wait and
       exit(2).  The former byte is 0 for normal termination, the latter is
       customarily 0 for successful execution, nonzero to indicate troubles
       such as erroneous parameters, bad or inaccessible data, or other
       inability to cope with the task at hand.  It is called variously `exit
       code', `exit status' or `return code', and is described only where
       special conventions are involved.

                                                                      INTRO(1)

NAME | DESCRIPTION | SEE ALSO | DIAGNOSTICS | DIAGNOSTICS

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