crypto-modules-4.4.0-21-generi software package provides crypto modules, 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 crypto-modules-4.4.0-21-generi
crypto-modules-4.4.0-21-generi is installed in your system.
Make ensure the crypto-modules-4.4.0-21-generi package were installed using the commands given below,
$ sudo dpkg-query -l | grep crypto-modules-4.4.0-21-generi*
You will get with crypto-modules-4.4.0-21-generi package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | debian-installer udeb packages |
| Package | crypto-modules-4.4.0-21-generi |
| Version | 4.4.0-21.37 |
| Description | crypto modules |
| Sub Section | Debian-installer |