For other uses, see closure
To shut down or power off a computer is to remove power from a computer ‘s main components in a control way. After a calculator is shut down, main components such as CPUs, RAM modules and hard disk drives are powered down, although some inner components, such as an home clock, may retain world power .

Implementations [edit ]

The closure feature of speech and command is available in Microsoft Windows, [ 1 ] ReactOS, [ 2 ] HP MPE/iX, [ 3 ] and in a count of Unix and Unix-like operating systems such as Apple macOS.

Microsoft Windows and ReactOS [edit ]

In Microsoft Windows and ReactOS, a personal computer or server is shut down by selecting the Shutdown detail from the Start menu on the background. Options include shutting down the system and powering off, mechanically restarting the system after shutting down, or putting the system into stand-by mode. just like other operating systems, Windows has the option to prohibit choose users from shutting down a calculator. On a home personal computer, every user may have the closure option, but in computers on large networks ( such as Active Directory ), an administrator can revoke the access rights of selected users to shut down a Windows computer. Nowadays there are many software utilities which can automate the task of shutting down a Windows computer, enabling automatic computer operate. The Windows Shutdown web site lists respective software utilities to automate the tax of shutting down. In Windows, a program can shut down the system by calling the ExitWindowsEx or NtShutdownSystem function. [ 4 ]

Command-line interface [edit ]

There is besides a shutdown command that can be executed within a command shell window. shutdown.exe is the command-line closure application ( located in %windir%\System32\shutdown.exe) [ 5 ] that can shut down the user ‘s computer or another calculator on the exploiter ‘s network. different parameters allow different functions. More than one parameter can be used at a time for this command. [ 6 ]

Parameter Function
-log off Logs off a user. This is the default even without using any parameters.
-standby Stops shutdown.exe. It is used during a time-out period.
-hibernate Kills all running applications.
Shutdown Turns the computer off.
Reboot Shuts down and reboots a computer.
-m[\\ Computer Name] When shutting down a network computer, allows user to choose
which calculator to turn off.

-t xx Timer before shut down occurs.
By default option it is set to 30 seconds .
-c “message” Allows a message to be shown in the System Shutdown window.
It can not be more than 127 characters .

Apple macOS [edit ]

In Apple macOS the computer can be shut down by choosing “ Shut Down… ” from the Apple Menu or by pressing the might key to bring up the office management dialogue box and selecting button “ Shut down ”. An administrator may besides use the Unix shutdown command equally well. [ 7 ] It can besides be shut down by pressing [ Alt ] + [ Command ] + [ Eject ocular disk on optical drive ] but this will not prompt the user anything at all. On some older Macintosh Apple computers, starting with Mac OS 9, the user is given a time restrict in which the calculator will mechanically shut down if the exploiter does not click the “ Shut Down ” button .

Unix and Linux [edit ]

In Unix and Linux, the shutdown command can be used to turn off or reboot a computer. only the superuser can shut the system down. One normally issued form of this command is shutdown -h now, which will shut down a system immediately. Another one is shutdown -r now to reboot. Another form allows the exploiter to specify an exact time or a stay before closure : shutdown -h 20:00 will turn the computer off at 8:00 PM, and shutdown -r +1 will automatically reboot the car in one minute of issuing the command. [ 8 ]

See besides [edit ]

References [edit ]

far interpretation [edit ]

  • shutdown | Microsoft Docs
  • shutdown.cc – an article about various ways of automated and manual shutting down of Microsoft Windows