Outwiker is a free and open source personal Wiki and outliner application for Windows and Linux. Using this Outwiker application you can store notes in a tree and it store notes as folders on disk. It comes with tags, page links, bookmarks, icons for notes, attach files, different page types and plugins support. You can also insert image in page and create plain text, HTML pages and wiki pages.
Install Outwiker on Ubuntu Linux
Outwiker is available as snap and flatpak packages for Ubuntu Linux. You can install it via command-line terminal application. Open terminal and run below Outwiker snap installation command.
sudo snap install outwiker
sudo snap connect outwiker:cups-control
sudo snap connect outwiker:removable-media
You can open outwiker with application menu or via below command.
Install Outwiker via Flatpak:
Install flatpak and flathub and in terminal app run below Outwiker flatpak installation command.
flatpak install flathub net.jenyay.Outwiker
It will install the latest version of Outwiker on your Ubuntu system. You can run Outwiker flatpak via below command.
flatpak run net.jenyay.Outwiker