A File Glob is a way to match files.
*.* matches all files/dirs that contain a "." in them.
a* matches all files/dirs that begin with a
[a-z]* matches all files/dirs that begin with a lowercase letter
*.gz matches all files/dirs that end with .gz
[^A-C]* matches all files/dirs that do not begin with A or B or C.
Note, * and ? __don't__ match / or a . at the beginning of a filename eg: * doesn't match: 1) .foo 2) baz/nargle but does match: 1) foo.txt 2) baz/
This is a shell option that can be enabled by doing
?(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 pattern-list is just a bunch of globs separated by the | character.
1) cp !(*.[Jj][Pp][Gg]|*.[Bb][Mm][Pp]) /dest/dir will copy every file to ''/dest/dir'' that is not a jpg or bmp file. 2) ls @(*foo*|*bar*|*car*) will list every file/directory that has either foo, bar or car in its name. 3) mv file+([0-9]) /dest/dir/ will move every file/directory that has a prefix of ''file'' followed by at least one number.
See glob(7) for more advanced uses.
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