Wake-On-LAN (WOL) is a very useful feature if you have got a LAB at home and want to make it energy efficient. I have written a small BASH script to automate the Wake-On-LAN (WOL) procedure which can be used in an instance where there is a ESXi server which can turned on as and when required and then shutdown when not needed. Believe me it saves a lot on electric bills as the Servers are not running 24/7 and powered on only when required.
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