$ sudo apt-get update
$ sudo apt-get install libfcgi-bin 

libfcgi-bin is installed in your system.

Make ensure the libfcgi-bin package were installed using the commands given below,

$ sudo dpkg-query -l | grep libfcgi-bin *

You will get with libfcgi-bin package name, version, architecture and description in a table

libfcgi-bin package basic information: