cl-ftp software package provides Common Lisp FTP library, 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-ftp
cl-ftp is installed in your system.
Make ensure the cl-ftp package were installed using the commands given below,
$ sudo dpkg-query -l | grep cl-ftp *
You will get with cl-ftp package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Development |
| Package | cl-ftp |
| Version | 1.3.3-2 |
| Description | Common Lisp FTP library |
| Sub Section | Devel |