• wget下载文件到指定目录 -P prefix

-P prefix
--directory-prefix=prefix
           Set directory prefix to prefix.  The directory prefix is the
           directory where all other files and sub-directories will be
           saved to, i.e. the top of the retrieval tree.  The default
           is . (the current directory).

举例：

wget <file.ext> -P /path/to/folder

• wget下载文件到指定目录下文件名 -O filename

-O file
--output-document=file
    The documents will not be written to the appropriate files, but all will be
    concatenated together and written to file.  If - is used as file, documents will be
    printed to standard output, disabling link conversion.  (Use ./- to print to a file
    literally named -.)

举例：

wget <file.ext> -O /path/to/folder/file.ext

• wget镜像网站目录 -m

参考

• How to specify the location with wget?