TOPIC
    about_wildcards

SHORT DESCRIPTION
    Describes how to use wildcard characters in Windows PowerShell.

LONG DESCRIPTION
    In many cases, you will want to run a cmdlet against a group of
    items rather than an individual item. For example, you might
    want to locate all the files in the C:\Techdocs directory that have a
    .ppt file name extension. If you were to run the following command, it
    would return all the items in the directory:

        Get-ChildItem c:\techdocs

    The problem with this command is that you would have to visually
    inspect all the documents listed in the directory to determine which
    files use the .ppt file name extension. However, you can limit the items
    that are returned by using wildcard characters in a cmdlet’s parameters.
    A wildcard character is a type of placeholder that allows you to search
    unknown values in order to return specific results. The process of using
    wildcard characters is sometimes referred to as “globbing”. For example,
    you can recast the previous example so that only .ppt files are
    returned:

        Get-ChildItem c:\techdocs\*.ppt

    In this case, the asterisk (*) is used as a wildcard character to specify
    that any characters can exist before the .ppt file name extension. Because
    the file name extension is included, all files returned by the command must
    have that file name extension, but the files can have any name. As a
    result, only the files that you are looking for are returned.

    Windows PowerShell supports several wildcard characters in addition to the
    asterisk wildcard character.

        Wildcard Description        Example Match             No match
        ——– —————— ——– —————– ——–
        *        Matches zero or    a*     A, ag, Apple     banana
                 more characters

        ?        Matches exactly    ?n     an, in, on        ran
                 one character in
                 the specified
                 position

        [ ]     Matches a range    [a-l]ook book, cook, look took
                 of characters

        [ ]     Matches specified [bc]ook book, cook        hook
                 characters

    Most cmdlets accept wildcard characters in some of their parameters. The
    Help topic for each cmdlet describes which parameters, if any, permit
    wildcard characters. For parameters in which wildcard characters are
    accepted, their use is case insensitive. For example, ?n will return An,
    an, In, in, On, and on.

    You can also mix wildcard characters within a single parameter. For
    example, suppose that you want to display all the .txt files in the
    C:\Techdocs directory that begin with the letters a through l. You can use
    the following command:

        Get-ChildItem c:\techdocs\[a-l]*.txt

    The command uses a range wildcard ([a-l]) to specify that the file name
    should begin with the letters a through l. The command then uses the
    asterisk wildcard character to provide a placeholder for any characters
    between the first letter and the file name extension.

SEE ALSO
    about_Language_Keywords