Master Key is a free and open source password manager application for Linux. Using Master key, you can generate and manage passwords without the need to store. It is written in Python 3 and GTK and released under GNU General Public License v3.0 or later. It creates passwords using the master key, site and login combinations. It comes with password recreation, strong encryption and simple and easy to use tool.
How to Install Master Key on Ubuntu Linux
Master Key is available as a flatpak package file from the remote flathub store. So you need to install flatpak and flathub on your system first and restart it after the installation. Follow below link for flatpak and flathub installation instructions.
Install flatpak and flathub on Ubuntu
After that open the terminal app (ctrl+alt+t) and run below Master Key flatpak install command. It will install the latest version of Master Key on your Ubuntu Linux system.
flatpak install flathub com.gitlab.guillermop.MasterKey
After the installation, you can open Master Key using below command.
flatpak run com.gitlab.guillermop.MasterKey
And Uninstall Master Key using this command.
sudo flatpak uninstall com.gitlab.guillermop.MasterKey