32v 1m intro

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INTRO(1) UNIX Programmer's Manual INTRO(1)


    intro - introduction to commands


    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
    (1M) Commands used primarily for system maintenance.
    The word `local' at the foot of a page means that the com-
    mand is not intended for general distribution.  The word
    `UNIX/32V' at the foot of a page means that some or all of
    the description applies only to the UNIX/32V system for the
    Digital Equipment Corporation VAX-11.


    Section (6) for computer games.
    _H_o_w _t_o _g_e_t _s_t_a_r_t_e_d, in the Introduction.


    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 _w_a_i_t and _e_x_i_t(2).  The former byte is 0 for
    normal termination, the latter is customarily 0 for success-
    ful execution, nonzero to indicate troubles such as errone-
    ous 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.