What's a good free e-journal software program for Ubuntu / Linux?

I’m envisioning a blog type format that shows a preview of the text you type in a text box, and allows you to save a dated page and then flip through images of the pages like an e-book, or click on a date on a calendar to go directly to a specific dated entry. Also with search function, of course, and some kind of password protection. Does something like this exist? It must?