我下载了一个.zip文件throw wget命令。但是我无法解压缩。如果我尝试使用unzip命令解压缩，它会说。
Archive: ngrok-stable-linux-amd64.zip
End-of-central-directory signature not found.
Either this file is not
a zipfile, or it constitutes one disk of a mu
lti-part archive. In the
latter case the central directory and zipfile
comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of
ngrok-stable-linux-amd64.zip or
ngrok-stable-linux-amd64.zip.zip, and c
annot find ngrok-stable-linux-amd64.zip.ZIP, pe
riod.