March 2002
Beginner
504 pages
10h 47m
English
Content preview from Sams Teach Yourself Shell Programming in 24 Hours, Second Edition
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Pattern Matching and Regular Expressions
This section describes the meta-characters and rules for filename expansion, pattern matching for the case statement, and regular expressions.
Filename Expansion and Pattern Matching
The rules for filename expansion are as follows:
Any word on the command line that contains a meta-character is expanded to a list of files that match the pattern word.
If no filename matches are found, the pattern word is not substituted.
Meta-characters cannot match a leading period or a slash.
The filename expansion meta-characters are
| * | matches 0 or more of any character |
| ? | matches exactly 1 of any character |
| [list] | matches exactly 1 of any character in list |
| [!list] | matches exactly 1 of any character not in list |
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