$ sudo apt-get update
$ sudo apt-get install libfcgi0ldbl 

libfcgi0ldbl is installed in your system.

Make ensure the libfcgi0ldbl package were installed using the commands given below,

$ sudo dpkg-query -l | grep libfcgi0ldbl *

You will get with libfcgi0ldbl package name, version, architecture and description in a table

libfcgi0ldbl package basic information: