07-31-2012
Quote:
practically want to power off a PC , something like unplugging a power cable of a machine which doesnt has a UPS connected to it. Is it possible via any software or statements?
This is a foolish action which is quite likely to damage your data and can result in a system which never works again.
Btw. CentOS is Linux variant. It is not unix.
However if this is a proper server with a management card it should be possible to control the power switch with remote management software (however stupid this action may be). If it is just a PC, not a hope short of using Internet-controlled power switches (which are available).
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dxpower(8) System Manager's Manual dxpower(8)
NAME
dxpower - controls energy saving features on systems that can be power managed
SYNOPSIS
/usr/bin/X11/dxpower
DESCRIPTION
The Power Manager application, dxpower, is used to maintain and manage the power management features on computers and peripherals that can
be power managed.
Power Manager lets you place monitors in three power saving modes: Standby, Suspend, or Off and lets you selectively spin down inactive
disks to reduce power consumption. You also can specify when you want power management features to be active: always, never, or only at a
specific time of day.
Privileged (root) users have the capability to set system wide power management values. Non-privileged users set power management values
on their monitors for the current log in session.
The Power Manager application can be invoked from: The CDE Application Manager Application Group: System_Admin System Admin Subgroup: Dai-
lyAdmin
If you are not using CDE, start Power Manager from the command line: # /usr/bin/X11/dxpower
For more information about how to use the Power Manager application, start the application and click on the Help button.
An alternative to using the Power Manager application is to set and control power management attributes from the command line by using the
sysconfig command. Refer to System Administration for more information about setting and controlling power management from the command
line.
SEE ALSO
Commands: sysconfig(8)
System Administration
dxpower(8)