Save Power using Wake On Lan

Apart from Virtulization we can shut servers whenever it is not being used to save power.

At my office, we used to keep Antivirus server running 24×7, to get latest definition updates & to let users fetch. This was not necessary to keep server ON whole night as there was no user. Also we had same situation for Squid server & Samba, NFS share.

All these servers were required to be up & running before employees enters office.
In other words we required to keep all servers running 5 days a week. It was of no use to keep it running during nights & weekend.

Using Wake-on-lan we could get all server up before office hours.

We use NAGIOS, this one is ON 24×7 to monitor links & live servers.

By configuring Cronjob on Nagios we got all servers UP before office hours.

etherwake / ether-wake is available on almost all distro. you can get server up
ether-wake MACADD

to install ether-wake
Centos – yum install ether-wake
Ubuntu – apt-get install etherwake

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