How to run some graphical application automatically every hour

An example if you want you schedule to pop up for every hour.

1. Install Osmo and add the task you want to its timeline.
sudo apt-get install osmo
2. Check you display number using command
xdpyinfo | grep display
… if comand prints “name of display: :0.0” , add the next command to the crontab
crontab -e ## choose nano when asking
… add the line
0 * * * * export DISPLAY=:0 && /usr/bin/osmo

calendar