Turn Off Beep in Ubuntu

You can disable this by editing a file and entering two simple lines.

gedit /etc/modprobe.d/blacklist

And then add:

#silly speaker beep
blacklist pcspkr

Save your file and the speaker beep will be gone when you reboot.

If you don’t want to wait until a reboot, simply type:

sudo rmmod pcspkr

 

Original post: http://www.arsgeek.com/2006/08/23/how-to-turn-off-the-annoying-system-beep-in-linux-debianubuntu/