How To Clear Ubuntu Notifications From NotifyOSD

The package responsible for notifications on your Ubuntu 12.04, Ubuntu 12.10 or Ubuntu 13.04 is notifyosd.

If you want to get rid of all the notifications, kill the notifyosd process, and you have peace and quiet until you reboot:

$ sudo pkill -9 notifyosd

The easiest way to permanently disable it, from the command line interface is to kill it at boot. Add pkill -9 notifyosd in your /etc/rc.local file:

$ sudo su
# echo 'pkill -9 notifyosd' >> /etc/rc.local

If you decide you will never use it again, this is how you uninstall notifyosd:

$ sudo apt-get purge notifyosd

Bonus, how to install notifyosd on back, Ubuntu:

$ sudo apt-get install notifyosd