I'm running QEMU on Linux without GUI.
After running starting my custom kernel with QEMU, I can't kill and return to host by pressing Ctrl+C.
Is there any way to get back to host OS?
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6 Answers
Ctrl-A x
For -nographic just enter:
Ctrl-A x
which means
- first press Ctrl + A (A is just key a, not the alt key),
- then release the keys,
- afterwards press X (lowercase x; no Shift, case matters).
Alternatively:
enter the QEMU monitor with
Ctrl-A Cthen type:quitand press enter. See also: https://stackoverflow.com/questions/14165158/how-to-switch-to-qemu-monitor-console-when-running-with-curses
use the QEMU monitor (same as
Ctrl-A C) withtelnet:qemu-system-x86_64 -monitor telnet::45454,server,nowait -serial mon:stdioand on a host terminal:
telnet localhost 45454and then
quitfrom there.-serial mon:stdiois required to keep Ctrl+C working: https://stackoverflow.com/questions/49716931/how-to-run-qemu-with-nographic-and-monitor-but-still-be-able-to-send-ctrlc-to/49751144#49751144shut down the VM from guest normally, e.g. with a
powerdowncommand from a Linux guest shell if you are able. This of course goes through the normal shutdown sequence instead of immediately killing the VM, but sometimes it is just the simplest approach.It does not work for all machines however: https://stackoverflow.com/questions/31990487/how-to-cleanly-exit-qemu-after-executing-bare-metal-program-without-user-interve
Tested in Ubuntu 17.10, QEMU 2.10.1.
answered May 22, 2017 at 5:50
Ciro Santilli OurBigBook.comCiro Santilli OurBigBook.com
11.8k6 gold badges69 silver badges64 bronze badges
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1@vharron yes, my amazing explanation skills have finally been surpassed Commented Sep 25, 2019 at 21:19
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1@raddevus what's your host OS / QEMU version? Where I tested (Ubuntu 17.10, QEMU 2.10.1) and many other QEMU / Ubuntu versions it was Ctrl + A without shift for sure. Maybe it's a QEMU version / OS difference. Also in docs: qemu.org/docs/master/system/mux-chardev.html Commented May 19 at 20:31
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1@CiroSantilliOurBigBook.com Oh, interesting. I'm running Ubuntu 22.04.4 LTS and QEMU emulator version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.19). Ok, i just tried it again with lowercase a and it works. I must've fat-fingered a couple of times. Sorry about the noise. I feel a bit dumb.– raddevusCommented May 19 at 20:34
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1@raddevus no problem, thanks for double checking! Commented May 20 at 7:39
To close a QEMU process in your shell:
ctrl+a, then x
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When using -nographics and -monitor need to include -serial mon:stdio que keep ctrl+a working. stackoverflow.com/questions/49716931/…– arvatiCommented Jul 3, 2020 at 10:41
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Ok, found a solution.
- Opened new terminal session: ctrl+alt+f2
- Used ps to find PID of previous tty: ps -fu
- Killed previous tty: kill -HUP PID
answered Jun 10, 2016 at 23:21
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6This is a really inferior solution to the most upvoted answer here. I will not downvote the answer, since it was entered before the better solutions.– EFraimCommented Aug 21, 2018 at 8:05
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Not necessarily inferior, it still caters to situations where the CtrlA,X way doesn't work, eg when qemu gets stuck trying to bring up an OS. It's just an alternate answer.– MendhakCommented Oct 15, 2023 at 11:21
This is just in addition to other answers, where ctrl-a x works but you've aliased over it. If you're like me, you're using tmux with ctrl-b replaced with ctrl-a, which is why you can't use ctrl-a x. A simple solution to this is to use tmux's send-keys utility to send ctrl-a x to qemu.
In a running tmux window, press ctrl-a : to bring up the tmux prompt, then type send-keys C-a x Enter and qemu will quit.
i tried
Ctrl + Alt + Q
That worked for me, even if most of the documentation I see only says to use
Ctrl + Q
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1Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.– Community BotCommented May 23 at 18:19