$ sudo apt-get update
$ sudo apt-get install libkldap4 

libkldap4 is installed in your system.

Make ensure the libkldap4 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libkldap4 *

You will get with libkldap4 package name, version, architecture and description in a table

libkldap4 package basic information: