安装ssdeep

$wget http://sourceforge.net/projects/ssdeep/files/ssdeep-2.13/ssdeep-2.13.tar.gz/download
$mv dowonload download.tar.gz
$tar -zxf download.tar.gz
$cd ssdeep-2.13
$./configure
$make
$sudo make install
#确认安装无误
$ssdeep -V(大写) 

准备恶意程序并使用ssdeep提取hash

ssdeep  ./webshell/*  >badhash

在服务器上使用badhash查找

ssdeep -t 50 -m  badhash /var/www/* -r >logn