报错信息如下：
Archive: vulhub-master (1).zip
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-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 vulhub-master (1).zip or
vulhub-master (1).zip.zip, and cannot find vulhub-master (1).zip.ZIP, period.
如图所示：
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解决方法：
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使用命令安装jar工具：
yum -y install java-1.6.0-openjdk-devel
安装完成后使用命令解压：jar xvf 要解压的文件名
解压成功：
PS：本方法只针对Centos7.