cherrytree software package provides hierarchical note taking application, 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 cherrytree
cherrytree is installed in your system.
Make ensure the cherrytree package were installed using the commands given below,
$ sudo dpkg-query -l | grep cherrytree *
You will get with cherrytree package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Editors |
| Package | cherrytree |
| Version | 0.37.6-1 |
| Description | hierarchical note taking application |
| Sub Section | Editors |