freeradius-ldap software package provides LDAP module for FreeRADIUS server, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install freeradius-ldap
freeradius-ldap is installed in your system.
Make ensure the freeradius-ldap package were installed using the commands given below,
$ sudo dpkg-query -l | grep freeradius-ldap *
You will get with freeradius-ldap package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | freeradius-ldap |
| Version | 2.2.8+dfsg-0.1build2 |
| Description | LDAP module for FreeRADIUS server |
| Sub Section | Net |