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intro(1) [freebsd man page]

INTRO(1)						    BSD General Commands Manual 						  INTRO(1)

NAME
intro -- introduction to general commands (tools and utilities) DESCRIPTION
Section one of the manual contains most of the commands which comprise the BSD user environment. Some of the commands included in section one are text editors, command shell interpreters, searching and sorting tools, file manipulation commands, system status commands, remote file copy commands, mail commands, compilers and compiler tools, formatted output tools, and line printer commands. All commands set a status value upon exit which may be tested to see if the command completed normally. Traditionally, the value 0 signifies successful completion of the command, while a value >0 indicates an error. Some commands attempt to describe the nature of the failure by using exit codes as defined in sysexits(3), while others simply set the status to an arbitrary value >0 (typically 1). SEE ALSO
apropos(1), man(1), intro(2), intro(3), sysexits(3), intro(4), intro(5), intro(6), intro(7), security(7), intro(8), intro(9) Tutorials in the UNIX User's Manual Supplementary Documents. HISTORY
The intro manual page appeared in Version 6 AT&T UNIX. BSD
October 21, 2001 BSD

Check Out this Related Man Page

intro(1)						      General Commands Manual							  intro(1)

NAME
intro - Introduction to commands DESCRIPTION
Section 1 describes the commands available for all Tru64 UNIX users. Some reference pages in this section may contain suffixes to allow their files to exist with those of other reference pages having the same base name and section number. When used, suffixes are made up of one to four letters. See the man(1) reference page for more information on suffixes. Commands related to system maintenance appear in Section 8. ERRORS
On 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. For more information, see exit(2). The first byte is 0 for normal termination; the sec- ond byte is customarily 0 for successful execution. A nonzero status indicates a problem, such as erroneous parameters, or bad or inacces- sible data. The status value is called variously exit code, exit status, or return code, and is described explicitly on reference pages only when special conventions apply. SEE ALSO
Commands: man(1) Functions: exit(2) intro(1)

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