libghc-entropy-dev software package provides cryptographically-strong entropy, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libghc-entropy-dev
libghc-entropy-dev is installed in your system.
Make ensure the libghc-entropy-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-entropy-dev *
You will get with libghc-entropy-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Haskell |
| Package | libghc-entropy-dev |
| Version | 0.2.1-5 |
| Description | cryptographically-strong entropy |
| Sub Section | Haskell |