NAME

intro − introduction to commands

DESCRIPTION

Section 1 of the Programmers Manual contains short descriptions of commands used directly at the user interface level, rather than as a part of programs or system administration and maintenance.  The commands appear in alphabetic order. 

SEE ALSO

Section (6) for computer games, section (8) for system maintenance commands. 

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(1) 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.

7th Edition  —  1/18/82