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Shell Programming in Unix, Linux and OS X, Fourth Edition by Patrick Wood, Stephen G. Kochan

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A. Shell Summary

This appendix summarizes the main features of the standard POSIX shell as per IEEE Std 1003.1-2001.

Startup

The shell can be given the same options on the command line as can be specified with the set command. In addition, the following options can be specified:

Image

Commands

The general format of a command typed to the shell is

command arguments

where command is the name of the program to be executed, and arguments are its arguments. The command name and the arguments are delimited by whitespace characters, normally the space, tab, and newline characters (changing the variable IFS affects this).

Multiple commands can be typed ...

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