cl-fad software package provides portable pathname library for Common Lisp, 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 cl-fad
cl-fad is installed in your system.
Make ensure the cl-fad package were installed using the commands given below,
$ sudo dpkg-query -l | grep cl-fad *
You will get with cl-fad package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Lisp |
| Package | cl-fad |
| Version | 0.7.3-1 |
| Description | portable pathname library for Common Lisp |
| Sub Section | Lisp |