Solanum is a free and open source time management application for Linux. Using Solanum you can manage your working time and break time easily on your system. It is based on Pomodoro time management technique. In this method you can set work time in 4 sessions with breaks in between each session and 1 long break after all 4 session. It is released under GNU General Public License version 3 or later.
Install Solanum on Ubuntu Linux
Solanum is available as a flatpak package for your Linux system from flathub remote. You need to install flatpak and flathub on your system and restart after the installation. Follow the below link for flatpak installation instructions.
Now open the terminal command-line application using ctrl+alt+t keys and run below Solanum flatpak installation command.
flatpak install flathub org.gnome.Solanum
After the installation run this command to start it.
flatpak run org.gnome.Solanum
You can also uninstall the app using below command.
sudo flatpak uninstall org.gnome.Solanum