Measure the test taker's knowledge about file wildcards.

3. wildcard file name

Glob

Special characters, metacharacters, do not represent the surface meaning of the characters, but can only

Match a string that meets the specified condition;

*: Any character of any length a * B, starting with a and ending with B );

? : Any single character? B, a character between a and B );

[]: Match any single character a [character] B within the specified range.

[]) [A-zA-Z]);

Ls a [''] [a-zA-Z] displays the files with spaces starting with;

4. man 7 glob)

[: Alnum:] [: alpha:] [: blank:] [: cntrl:]

[: Digit:] [: graph:] [: lower:] [: print:]

[: Punct:] [: space:] [: upper:] [: xdigit:]

[: Alpha:] = [a-zA-Z]

[: Digit:] = [0-9]

[: Lower:] = [a-z]

[: Upper:] = [A-Z]

[: Alnum:] = [a-zA-Z0-9]

[: Space:] single blank character

[: Punct:] All punctuation marks

[: Print:] All printed characters

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