Linux file name wildcard

A wildcard is a special statement used to blur the search for a file. When looking for a folder or directory, you can use it instead of one or more real characters

Wildcard characters:
*: matches any character of any length (packet 0 characters)

        [[email protected] tt]# ls                 ab  abb  abc   abm  xab  #  If you have documents         [[email  protected] tt]# ls ab*             ab  abb  abc  abm    #  match with AB start followed by any character          [[email protected] tt]# ls *ab             ab  xab               #  match with AB end          [[email protected] tt]# ls *ab*             ab  abb  abc  abm  xab     #匹配包含ab的文件 

? : Matches any single character

[[email protected] tt]# ls a? Ab

[ ]: matches any single character within the specified range of characters, the wildcard itself is not case-sensitive.

[XYZ] # match XYZ [A-z] # match A-Z letter set [A-z] # match uppercase set [0-9] # match number [0-9a-za-z] # match Digit case letters [[email protected] tmp]# ls a[0-9]* a1b a2b a3b a4b a5b a6b a7b a8b a9b

It is recommended to use the Posi specification to match, as the following character set can be case-sensitive
[[: Upper:]]All uppercase letters
[[: Lower:]]lowercase letters
[[: Alpha:]]Uppercase and lowercase letters set
[[:d igit:]]Digital
[[: Alnum:]]Contains numbers and alphabet
[[: Space:]]Space
[[:p UNCT:]]Punctuation

[^]: Matches any single character that is outside the specified range of characters to match the inverse of

[[email protected] tmp]# rm-rf./[^my]* # Delete the file in the current directory that is not the beginning of my, followed by the * number to indicate the end of whatever

[^0-9] # any character other than a number [^[:d igit:]] # If it's a character set, use this notation

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Linux file name wildcard