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What are wild cards and explain their usage in pattern matching in unix?
Wiki User
∙ 13y ago
wild cards are a special set of character used by the shell to match file name .A wild card "Stand in" for other character of the file name .The file name pattern is formed by ordinary character and meta character using well defined rules .
When the pattern is used as an arguments with a command , the shell first suitably expand the arguments and then executes the command . The use of wild card make easier to deal with file in UNIX
* any number of character - including zero character
? single character
[abc] single character - either a,b,c
[a-d] any single character in the range of a to d
[!abc] a single character that is not a, b, and c
[!a-d] any character not in the range of a to d
Wiki User
∙ 13y ago
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