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 design.
(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.