Linux control alt delete

What is the equivalent of ‘Control-Alt-Delete’?

On Windows anytime the system hangs Ctrl — Alt — Del brings up the Start Up Manager, from which you can end the program or process causing the hang. Is there any command like this on Ubuntu?

When you press Ctrl+alt+del you then have to choose to open Task Manager from a list of other options. Ctrl+shift+esc skips that step and just opens Task Manager directly. Try it.

@Dee That should be bug-reported to Microsoft, posting it here just makes people happy they are using Ubuntu 🙂

8 Answers 8

System Monitor shows you an overview of running applications (under the Processes tab) and allows you to end them by right-clicking on the name and selecting the respective context menu item. You can set up keyboard shortcuts in the Keyboard settings (Shortcuts tab), so you can bind Ctrl + Alt + Del to gnome-system-monitor , the command to start System Monitor.

Another command you might be interested in is xkill . This is traditionally bound to Ctrl + Alt + Esc (not sure if by default) and allows you to click on a misbehaving window to close it.

Both of these might not work if your entire system hangs. If that happens, there are two things you can do. The first has to be enabled in advance when your system doesn’t hang yet (you could do it right now): open Keyboard Layout settings (I believe this is merged into Keyboard in Ubuntu 12.04), then click Options. One of the options is Key sequence to kill the X server, you can click that run gsettings get org.gnome.desktop.input-sources xkb-options for recent versions of Ubuntu (according to this answer). If you have done that and your system later hangs, you can press Ctrl + Alt + Backspace , which will effectively bring you back to the login screen.

If even that doesn’t work, the last thing you can do is ensuring a sane shutdown (i.e. not pressing and holding the power button). This one is a bit hard to remember, but it involves pressing and holding Alt + SysRq (system request, often same key as PrtScr print screen) and then while holding those two keys press one at a time in order R , E , I , S , U , B (a mnemonic is Reboot Even If System Utterly Broken, but may also be easily remembered as «BUSIER» backwards). Wait a second between each press, because each letter is a different kernel action leading to a «graceful» reset.

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ctrlalt-delete linux

In Windows you can easily kill any task by pressing Ctrl+Alt+Del and bringing up the task manager. Linux running the GNOME desktop environment (i.e. Debian, Ubuntu, Linux Mint, etc.) has a similar tool that can be enabled to run exactly the same way.

1. What does Ctrl Alt Delete do on Linux?
2. What is Ctrl Alt Delete on Ubuntu?
3. Is Ctrl Alt Delete dangerous?
4. Is there Task Manager in Linux?
5. What is Ctrl F4?
6. What does Ctrl Alt F4 do?
7. How do I kill a process in Ubuntu?
8. How do I disable Ctrl Alt Del in Linux?
9. How do I shut down Ubuntu?
10. Why is control alt delete a thing?
11. Why is Ctrl Alt Delete a mistake?
12. Is Ctrl Alt Delete necessary?

What does Ctrl Alt Delete do on Linux?

On some Linux-based operating systems including Ubuntu and Debian, Control + Alt + Delete is a shortcut for logging out. On Ubuntu Server, it is used to reboot a computer without logging in.

What is Ctrl Alt Delete on Ubuntu?

If you have used the Windows operating system, you have probably used Ctrl + Alt + Del combination to launch the task manager. By default pressing the keyboard shortcut keys, CTRL+ALT+DEL in the Ubuntu system prompts a logout dialogue box of the GNOME desktop environment.

Is Ctrl Alt Delete dangerous?

The above is also a way that Ctrl-Alt-Delete is dangerous even if physical access to the power/reset switches and power cables is prevented.

Is there Task Manager in Linux?

All the major Linux distributions have a task manager equivalent. Usually, it’s called System Monitor, but it actually depends on your Linux distribution and the desktop environment it uses.

What is Ctrl F4?

Alternatively referred to as Control+F4 and C-f4, Ctrl+F4 is a keyboard shortcut most often used to close a tab or window within a program. If you want to close a program and all of its tabs and windows, use the Alt + F4 keyboard shortcut. . Ctrl+F4 in Microsoft Windows.

What does Ctrl Alt F4 do?

Alt+F4 is a keyboard shortcut most often used to close the currently-active window. . If you want to close a tab or window open in a program, but not close the complete program, use the Ctrl + F4 keyboard shortcut.

How do I kill a process in Ubuntu?

1. First select the process that you want to end.
2. Click on the End Process button. You will get a confirmation alert. Click on “End Process” button to confirm that you want to kill the process.
3. This is the simplest way way to stop (end) a process.

How do I disable Ctrl Alt Del in Linux?

On a production system it is recommended that you disable the [Ctrl]-[Alt]-[Delete] shutdown. It is configured using /etc/inittab (used by sysv-compatible init process) file. The inittab file describes which processes are started at bootup and during normal operation.

How do I shut down Ubuntu?

There are two ways to shutdown Ubuntu Linux. Go to the upper right corner and click the drop down menu. You’ll see the shutdown button here. You can also use the command ‘shutdown now’.

Why is control alt delete a thing?

Ctrl-Alt-Del is the Secure Attention Key on Windows. The operating system enforces a strong non-interception policy for this key combination. You could make an application which goes full-screen, grabs the keyboard, and displays something which looks like the normal login screen, down to the last pixel.

Why is Ctrl Alt Delete a mistake?

The Microsoft co-founder said that there was an option to make a single button for such a command, but the IBM keyboard designer didn’t want to give Microsoft a single button. So Microsoft decided to use “Ctrl+Alt+Del” as a way to log into Windows. “It was a mistake,” Gates said, drawing a big laugh from the crowd.

Is Ctrl Alt Delete necessary?

From Interactive logon: Do not require CTRL+ALT+DEL: Not having to press CTRL+ALT+DEL leaves users susceptible to attacks that attempt to intercept the users’ passwords. Requiring CTRL+ALT+DEL before users log on ensures that users are communicating by means of a trusted path when entering their passwords.

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How to Use Ctrl+Alt+Del for Launching the Task Manager in Ubuntu Linux

If you have used Windows for a long time, you are probably habitual of using the magical Ctrl+Alt+Del keys to launch the task manager.

This is helpful when you want to force stop an unresponsive application or monitor system resource utilization.

When you switch to Linux from Windows and use the Ctrl+Alt+Del keys, you are more likely to see the option to log out from the Linux system.

Surprised? Don’t be. Ctrl+Alt+Del keyboard shortcut is Windows specific and it is not used for starting the task manager in Linux.

Yes, there is a Ctrl+Alt+Del equivalent task manager application in Ubuntu and it looks like this:

This task manager is not set by default to your favorite Ctrl+Alt+Del keys. You may change this behavior of course and I’ll show you the steps in this tutorial.

Using Ctrl+Alt+Del for the task manager in Ubuntu

If the sole purpose of pressing the Control Alt Delete keys is to launch the task manager in Linux, you can do it the Linux way.

Just search for “task manager” or “system monitor” in the menu and start the application from there.

If you really want to use Ctrl+Alt+Del keys to start the task manager in Ubuntu, you can do so by creating a custom keyboard shortcut. Let me show how to do that.

Step 1: Go to the Settings application.

Step 2: Scroll down a bit to locate the Keyboard Shortcuts. Go to the end of this screen and you’ll see a + sign. Click on it to add a custom keyboard shortcut.

Step 3: When you hit the + sign, it asks for the details of the custom keyboard shortcut you are creating. You can give it any name like Task Manager or System Monitor.

However, the command must be correct. In this case, you should enter the following command:

And then hit the Set Shortcut button.

Step 4: It will show a screen where it asks you to press the keys you want to set for launching the command gnome-system-monitor (which is the command for the task manager application in Ubuntu).

At this screen, press Ctrl, Alt and Del key together. For that press and hold the Ctrl and Alt keys and then hit the Del key.

If you pressed the wrong keys, you can hit cancel and start from the Step 2 again.

Step 5: It may show you a warning that the shortcut Ctrl+Alt+Del is already being used for logging out. It’s okay. You may choose to replace it.

Step 6: You are set to go. You should see the newly created keyboard shortcut under the Custom Shortcuts section.

Test it out by pressing the Ctrl+Alt+Del keys and see if it launches the task manager or not. That wasn’t too difficult, was it?

Reverting to the original settings

If you want to revert the process and return to the default settings, you can use the Reset All button on the top panel.

I hope you find this little tutorial helpful. Enjoy using Ctrl+Alt+Del keys in Ubuntu for launching task manager.

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