Control-Alt-Delete

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Kontrol-Alt-Delete (sering disingkat dengan Ctrl Alt Del , juga dikenal sebagai "penghormatan tiga jari" atau "Kunci Keamanan") adalah perintah keyboard komputer pada komputer yang kompatibel dengan PC IBM, dipanggil dengan menekan tombol Hapus sambil menahan tombol Kontrol dan Alt: Ctrl Alt Hapus . Fungsi kombinasi tombol berbeda-beda tergantung pada konteks tetapi biasanya mengganggu atau memfasilitasi interupsi fungsi. Misalnya, dalam lingkungan pra-boot (sebelum sistem operasi dimulai ) atau dalam DOS, Windows 3.0 dan versi sebelumnya dari Windows atau OS/2, kombinasi kuncinya akan menyalakan ulang komputer.Memulai dengan Windows 95, perintah memanggil task manager atau komponen terkait keamanan yang memfasilitasi mengakhiri sesi Windows.

Video Control-Alt-Delete

Histori

Fungsi reboot lunak via keyboard pada awalnya dirancang oleh David Bradley. Bradley, sebagai chief engineer dari proyek PC IBM dan pengembang mesin ROM-BIOS, pada awalnya menggunakan Ctrl Alt Esc , tetapi ternyata terlalu mudah untuk menabrak sisi kiri keyboard dan me-reboot komputer secara tidak sengaja. Menurut akunnya sendiri, Hallerman, yang merupakan pemrogram utama dari proyek, karena itu disarankan beralih kombinasi tombol ke Ctrl Alt Del sebagai ukuran keamanan, kombinasi yang mustahil untuk ditekan hanya dengan satu tangan pada keyboard PC IBM asli.

This feature was originally conceived only as a development feature for internal use and was not intended to be used by end users, as this triggered a reboot without warning or further confirmation - it was intended for use by the person writing the program or documentation so they could restart their computer without turn it off. Bill Gates (former CEO of Microsoft) remembers it as "just something we use in development and it will not be available elsewhere". This feature, however, is detailed in IBM's technical reference documentation to the original PC and thus disclosed to the general public.

Bradley saw this job as only a small task for many people: "It was five minutes, 10 minutes of activity, and then I moved on to 100 things to do." In an email in March 2018, one of Bradley's colleagues confirmed that the command was discovered in 1981 in Boca Raton, Florida.

Bradley was also known for his good stitching at Gates on the celebration of the 20th anniversary of the IBM PC: "I might have created it, but Bill made it famous"; he quickly adds it is a reference to the Windows NT logon procedure ("Press Ctrl Alt Delete to enter").

During the presentation of questions and answers on September 21, 2013, Gates said "it was a mistake", referring to the decision to use Ctrl Alt Del as a keyboard combination to log into Windows. Gates stated that he prefers one button to trigger the same action, but can not make IBM add additional buttons into the keyboard layout.

Maps Control-Alt-Delete

BIOS

By default, when the operating system is running in real mode (or in a pre-boot environment, when no operating system starts), this keystroke combination is intercepted by the BIOS. The BIOS reacts by doing a soft reboot (also known as a warm reboot). Examples of such operating systems include DOS, Windows 3.0 in Standard Mode as well as previous versions of Windows.

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Windows

Windows-based DOS

In Windows 9x and Windows 3.0 running in 386 Enhanced mode, the keystroke combination is recognized by Windows keyboard device drivers. In accordance with the LocalReboot option value in the [386Enh] section of the system.ini, Windows performs one of several actions in response. If LocalReboot = On (default):

• Windows 3.1x displays a blue screen that lets the user press Enter to end a task that stops responding to the system (if there is such a task) or press Control Alt Delete again to perform a soft reboot.
• Windows 9x pauses the entire system and displays the Close Programs dialog box, a window listing the current running processes and allowing the user to end it (by force, if necessary). Users can press Control Alt Delete again to perform a soft reboot.

Jika LocalReboot = Off , Windows melakukan reboot lunak.

Windows NT family

Windows NT family of operating systems, whose members do not have "NT" in their name since Windows 2000, Ctrl Alt Delete backup for the operating system itself. Winlogon, the core component of the operating system, responds to a combination of keys in the following scenarios:

Start Windows Security

When a user logs into a Windows computer, pressing Ctrl Alt Delete will activate Windows Security. This is a graphical user interface that allows users to lock the system, redirect users, log off, change passwords, call Windows Task Manager, or end Windows sessions by shutting down, rebooting or putting the computer to sleep or hibernation. The key combination always calls Windows Security in all versions and editions of the Windows NT family except Windows XP. (See below.) Before Windows Vista, Windows Security is a dialog box, it does not allow users to switch and indicate the date and time of logon, the name of the user account where the user has logged in and the computer name. Starting with Windows Vista, Windows Security becomes full screen.

Safe attention

Logon spoofing is a social engineering trick in which a malicious computer program, disguised as a Windows login dialog box, asks for a user account name and password to steal it. To thwart this attack, Windows NT implements an optional security action where Ctrl Alt Delete acts as a combination of secured attention buttons. Once protection is enabled, Windows requires the user to press Ctrl Alt Delete each time before entering or unlocking the computer. Because the combination of the key is intercepted by Windows itself and malicious software can not replicate this behavior, the trick is thwarted. Unless a Windows computer is part of a Windows domain network, secure attention protection is disabled by default and must be enabled by the user.

Windows XP Behavior

Windows XP introduced the Welcome Screen, a redesigned login interface. The Windows XP Welcome Screen, however, does not support secure attention scenarios. This may be disabled for the sake of a classic logon screen, either explicitly by the user or as a consequence of a Windows XP computer that is part of a Windows domain network. With that in mind, Windows XP uses three-fingered salute in the following unique scenario:

1. At the logon prompt, the key combination closes the Welcome Screen and invokes the classical logon user interface.
2. When a user logs into a Windows XP computer and the Welcome Screen is enabled, pressing the key combination will call Windows Task Manager instead of Windows Security.

Windows Vista and later Windows NT versions do not inherit any of the above.

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OS/2

In OS/2, this keystroke combination is recognized by the OS/2 keyboard device driver, which tells the session manager process. The normal session manager process in OS/2 version 2.0 and later is the Workplace Shell process, which displays a "system boots reboot" window and triggers a soft reboot. If pressed twice in succession OS/2 triggers a soft reboot directly, without waiting for the session manager process.

In both cases, the system clears the page cache, cleans all disk volumes, but does not close all programs running cleanly (and does not store unsaved documents, or current object settings on the Workplace Shell desktop or any of the open folders).

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Mac

Pada beberapa sistem operasi berbasis Linux termasuk Ubuntu dan Debian, Kontrol Alt Hapus adalah pintasan untuk keluar log.

In Ubuntu Server, it is used to reboot the computer without login.

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Equivalent on multiple platforms

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Cultural adoption

As computers become ubiquitous, so too, have jargon. Control-Alt-Delete can also mean "dump," or "delete".

Keystroke is famous and famous for escaping problems in pop culture. For example, in Billy Talent's song "Perfect World", parts of the lyrics include sequences and relate them to rearrange their memories and escape from the situation: "Control-Alt-Deleted. Reset my memory."

They are also used in the line in the song "Weird Al" Yankovic "It's All About the Pentiums":

"Play me online? Well, you know that I will beat you If I meet you I will Control-Alt-Delete you "

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See also

• Keyboard shortcuts

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Note

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References

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Further reading

Source of the article : Wikipedia