Enabling bash beep command

To enable bash beep command (Fedora Core 15) one have to execute:

yum install beep

Then as root:

chmod 4755 /usr/bin/beep
# remove snd-pcsp module from blacklisted ones
vi /etc/modprobe.d/blacklist.conf

insert # before blacklist snd-pcsp.

Now Emacs beeps on errors as well. To disable this feature one has to add to .emacs

(setq visible-bell t)

The error is signaled by a screen flash now (see also [Emacs] AlarmBell).