编辑/usr/local/nagios/etc/cgi.cfg文件，找到最后部分，将前面的注释去掉，下面是去掉注释的模板。保存退出后，重启NAGIOS服务。
再通过WEB访问，就能听到正常和严重的错误报警音了。
# SOUND OPTIONS
# These options allow you to specify an optional audio file
# that should be played in your browser window when there are
# problems on the network. The audio files are u
sed only in
# the status CGI. Only the sound for the most critical problem
# will be played. Order of importance (higher to lower) is as
# follows: unreachable hosts, down hosts, critical services,
# warning services, and unknown services. If there are no
# visible problems, the sound file optionally specified by
# 'normal_sound' variable will be played.
#
#
# <varname>=<sound_file>
#
# Note: All audio files must be placed in the /media subdirectory
# under the HTML path (i.e. /usr/local/nagios/share/media/).
host_unreachable_sound=hostdown.wav
host_down_sound=hostdown.wav
service_critical_sound=critical.wav
service_warning_sound=warning.wav
service_unknown_sound=warning.wav
#normal_sound=noproblem.wav
