A. Shell Summary

In This Appendix

• Startup

• Commands

• Comments

• Parameters and Variables

• Command Re-entry

• Quoting

• Filename Substitution

• I/O Redirection

• Exported Variables and Subshell Execution

• Functions

• Job Control

• Command 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:

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-c commands     commands are executed.-i              The shell is interactive. Signals 2, 3,                and 15 are ignored.-s              Commands are read from standard                input.

Commands ...

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