想在windows下使用命令来查找文件，可以使用如下命令：where
命令的格式如下：

WHERE [/R dir] [/Q] [/F] [/T] pattern...

Description:
    Displays the location of files that match the search pattern.
    By default, the search is done along the current directory and
    in the paths specified by the PATH environment variable.

Parameter List:
    /R       Recursively searches and displays the files that match the
             given pattern starting from the specified directory.

    /Q       Returns only the exit code, without displaying the list
             of matched files. (quite mode)

    /F       Displays the matched filename in double quotes.

    /T       Displays the file size, last modified date and time for all
             matched files.

    pattern  Specifies the search pattern for the files to match.
             Wildcards * and ? can be used in the pattern. The
             "$env:pattern" and "path:pattern" formats can also be
             specified, where "env" is an environment variable and
             the search is done in the specified paths of the "env"
             environment variable. These formats should not be used
             with /R. The search is also done by appending the
             extensions of the PATHEXT variable to the pattern.

     /?      Displays this help message.

  NOTE: The tool returns an error level of 0 if the search is
        successful, of 1 if the search is unsuccessful and
        of 2 for failures or errors.

Examples:
    WHERE /?
    WHERE myfilename1 myfile????.*
    WHERE $windir:*.*
    WHERE /R c:\windows *.exe *.dll *.bat 
    WHERE /Q ??.???
    WHERE "c:\windows;c:\windows\system32:*.dll"
    WHERE /F /T *.dll

我们想查找文件内容的命令是：find或者findstr
在linux下的查找文件的命令也是 :  where
也可以使用find -name
查找文件的内容的话，可以使用grep ,支持正则表达式，使用起来也很方便，再加上管道，有的时候会觉得特别的方便和快捷。


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