cl-base64 software package provides Common Lisp package to encode and decode base64 with URI support, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install cl-base64
cl-base64 is installed in your system.
Make ensure the cl-base64 package were installed using the commands given below,
$ sudo dpkg-query -l | grep cl-base64 *
You will get with cl-base64 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Lisp |
| Package | cl-base64 |
| Version | 3.3.4-1 |
| Description | Common Lisp package to encode and decode base64 with URI support |
| Sub Section | Lisp |