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| Appendix B Reference |

## B.2 Special Symbols

| | Set up a pipe.
> | Redirect output to a file.
< | Redirect input from a file.
>> | Append output to an existing file.
/ | Separator used in pathnames.
. | Current directory.
.. | Parent directory.
& | Process command in the background.
* | Match any number of characters in filename.
? | Match any single character in filename.
[] | Match any one of the enclosed characters in filename.
; | Command separator.
() | Group commands.

B.1 Commands and Their Meanings |  |