OKDay for Linux
Fully supports Ubuntu, Debian, CentOS, etc.
Easy to Use
The user interface is simple and intuitive, so you won't need to spend a lot of time learning how to use the software.
Multi-view mode
Tree: supports unlimited levels.
Calendar: date classification and timeline.
List: pin, sort, full text search, etc.
Page history
Track changes and never lose a previous version of your note.
Use data offline
Never lose a thought, even when you're offline.Supports local export and import.
Cross-platform & Data sync
Cross-platform and cross-system use. Suport WebDAV, Dropbox, etc.
Fuzzy search
Easily find specific keywords and phrases within your notes with precision and speed.