cw software package provides Morse code tutor - command line user interface, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install cw
cw is installed in your system.
Make ensure the cw package were installed using the commands given below,
$ sudo dpkg-query -l | grep cw *
You will get with cw package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Ham Radio |
| Package | cw |
| Version | 3.3.1-2 |
| Description | Morse code tutor - command line user interface |
| Sub Section | hamradio |