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Remember, these machines can be buried or remote, meaning physical switches are not an option since that will mean expensive physical trips.
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You can install relays instead of physical switches that are controlled by a separate hardware box that can be operated remotely. I once installed a remote landline operated mains switch on a server that was prone to crashing that allowed me to do a remote "switch off and back on" just by dialling a number and sending a sequence of characters to the remote modem.
Biting the hand that feeds IT
