Lifeograph is a free private digital diary software for linux.
Main features:
supports encrypted and unencrypted diaries
automatically logs out when not used for some time
automatically formats entry titles and subheadings
basic searching/filtering
favorite entries
entry tagging
spell checking
links between entries
links in URI form (http://, file://, mailto://, etc…)
automatic backups
printing individual entries or whole diaries
basic statistical charts
To install Lifeograph on ubuntu
1.Open Terminal.To open terminal click the Dash home from unity launcher.And type terminal in the search field. And click Terminal.
2.Type the below code in terminal and hit enter.
sudo add-apt-repository ppa:dmxe/ppa
3.Type your ubuntu password if needed.
4.Then press enter to continue or ctrl-c to cancel adding the ppa.
5.Type below command and hit enter
sudo apt-get update
6.Then type below command and press enter
sudo apt-get install lifeograph