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Top Forums UNIX for Dummies Questions & Answers How to get current power consumption of a machine Post 302683351 by methyl on Tuesday 7th of August 2012 07:01:35 PM
Old 08-07-2012
I'd be surprised if this was possible with software.

If you need accurate ambient figures, get an engineer to use a non-intrusive current meter on each mains lead.
However, beware of start-up current which can be much higher just after you power the computer on. This is why we have a designated power-up sequence (with delays) should there be a power-down of a computer room.

The manufacturer's maximum figures should be on the plate near the mains lead of each component.
 

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HALT(8) 							       halt								   HALT(8)

NAME
halt, poweroff, reboot - Halt, power-off or reboot the machine SYNOPSIS
halt [OPTIONS...] poweroff [OPTIONS...] reboot [OPTIONS...] DESCRIPTION
halt, poweroff, reboot may be used to halt, power-off or reboot the machine. OPTIONS
The following options are understood: --help Prints a short help text and exits. --halt Halt the machine, regardless of which one of the three commands is invoked. -p, --poweroff Power-off the machine, regardless of which one of the three commands is invoked. --reboot Reboot the machine, regardless of which one of the three commands is invoked. -f, --force Force immediate halt, power-off, reboot. Do not contact the init system. -w, --wtmp-only Only write wtmp shutdown entry, do not actually halt, power-off, reboot. -d, --no-wtmp Do not write wtmp shutdown entry. --no-wall Do not send wall message before halt, power-off, reboot. EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise. NOTES
These are legacy commands available for compatibility only. SEE ALSO
systemd(1), systemctl(1), shutdown(8), wall(1) systemd 208 HALT(8)
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