I have recently been converting my old computer into a webserver and leaving it switched on in my lounge. After the constantly whirring cooling fan started to bother me, I looked at reducing the CPU frequency in order to reduce heat production (and power consumption).
A bit of research led me to try and install CPUSPEED. However I when I tried to install via yum, I kept the getting package not available error.
I have since found the CPUPOWER package:
yum install cpupower
# cpupower --help Usage: cpupower [-d|--debug] [-c|--cpu cpulist ]
[ ] Supported commands are: frequency-info frequency-set idle-info idle-set set info monitor help Not all commands can make use of the -c cpulist option. Use 'cpupower help ' for getting help for above commands.
This is clearly very powerful for controlling the CPU. Enjoy the help file to find the answer, or for automatic control:
--cpu all frequency-set --governor ondemand