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If the extglob shell option is enabled using the shopt builtin, several extended
pattern matching operators are recognized. In the following description, a pat-
tern-list is a list of one or more patterns separated by a |. Composite patterns
may be formed using one or more of the following sub-patterns:
?(pattern-list)
Matches zero or one occurrence of the given patterns
*(pattern-list)
Matches zero or more occurrences of the given patterns
+(pattern-list)
Matches one or more occurrences of the given patterns
@(pattern-list)
Matches one of the given patterns
!(pattern-list)
Matches anything except one of the given patterns |
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