usr/share/man/cat1/intro.0



INTRO(1)                      1985                       INTRO(1)


N\bNA\bAM\bME\bE
     intro - introduction to commands

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     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.

     N.B.: Commands related to system maintenance used to appear
     in section 1 manual pages and were distinguished by (1M) at
     the top of the page.  These manual pages now appear in sec-
     tion 8.

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     Section (6) for computer games.

     _\bH_\bo_\bw _\bt_\bo _\bg_\be_\bt _\bs_\bt_\ba_\br_\bt_\be_\bd, in the Introduction.

D\bDI\bIA\bAG\bGN\bNO\bOS\bST\bTI\bIC\bCS\bS
     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 _\bw_\ba_\bi_\bt and _\be_\bx_\bi_\bt(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.


Printed 7/27/90               April                             1