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Forum Index : Microcontroller and PC projects : LINUX: Equivalent of END TASK?
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
When you have an application crash in Linux, is there a secret hotkey you can use to bring up the equivalent of Task Manager, where you can then kill the crashed application? I have had this happen a few times when a Linux application crashes, but then I have no way to get rid of it off the screen. Cos it has crashed, none of the buttons work, and you can't move the windows etc. In the past, I have simply restarted the Linux box, but surely there is some method to kill a crashed application? I'm not as afraid of the Linux console as I once was, so if I can do it that way, that would be OK too. Smoke makes things work. When the smoke gets out, it stops! |
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phil99 Guru  Joined: 11/02/2018 Location: AustraliaPosts: 2640 |
Many versions of Linux X support multiple desktops (4 is common). Unless Linux its self has frozen, it may be possible to switch to another desktop and shut it down from there. Does not always work. |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5089 |
Many Linux variants allow for <ctrl>-t to bring up a terminal window. The "sudo su" to become root. Then list the tasks (I don't have a linux box here, so I have to check what command that is) and kill the one that has crashed by typing "kill nnnn". nnn is the PID of the task. Volhout PicomiteVGA PETSCII ROBOTS |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7937 |
You'll probably find that, from a command line: either sudo su to become root or use a temporary root as sudo <command> The latter is popular on Raspberry Pi systems as the root level is normally disabled. sudo top lists *everything* about every process sudo ps shows a more abbreviated form You need the pid for the process that's being a pain in the proverbial then kill <pid> If you get the process name from the listing you can use killall <process_name> Yes, I cheated. I've not had a linux box running for a while so I had to refresh the old brain cells. :( I did remember bits of it though. :) https://www.linux.com/training-tutorials/how-kill-process-command-line/ Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10310 |
ps -aux to get the list of active tasks sudo kill -9 task_number Edited 2021-08-17 17:38 by matherp |
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| cs41 Newbie  Joined: 08/08/2016 Location: AustraliaPosts: 27 |
Another very useful command to kill a stalled program is " xkill " If you can bring up a terminal window, type xkill and press enter. Then put the cursor on the offending program and enter Usually that works... just occasionally it's not enough so then probably will need a restart. cs |
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| Rado Regular Member  Joined: 27/11/2020 Location: CroatiaPosts: 59 |
xkill is your tool of the choice. :) |
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| Rado Regular Member Joined: 27/11/2020 Location: CroatiaPosts: 59 |
You can also run xprop _NET_WM_PID from a terminal, click on the window, and get PID of the application in terminal. Then simply kill -9 PID to close it and hopefully not leave any zombie processes. |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5089 |
Hi Grogster, I remember you are running Puppy Linux. In Puppy Linux (I tested a few versions, not sure what you are running exactly) the generic way to open the task manager is the PC "Affengriff": <ctrl> <alt> <delete>. Since you are ROOT in Puppy Linux, you can kill whatever you want immediately. Success, Volhout Edited 2021-08-17 22:32 by Volhout PicomiteVGA PETSCII ROBOTS |
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LeoNicolas Guru Joined: 07/10/2020 Location: CanadaPosts: 504 |
Try this: alt + F2 -> type xkill and press enter Click on the frozen app You can also define a new shortcut to open the System Monitor or run directly the xkill command. I like to install the System Monitor plugin on my desktop. This plugin has a quick access to it. For Gnome 3: https://extensions.gnome.org/extension/120/system-monitor/ |
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| Bizzie Senior Member  Joined: 06/07/2014 Location: AustraliaPosts: 192 |
I don't like xkill! Just nuked more than I wanted by clicking the wrong window! I would use kill -9 <PID> Rob White |
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| LeoNicolas Guru Joined: 07/10/2020 Location: CanadaPosts: 504 |
You can also use killall <process name> |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9610 |
Lots of replies! Thanks, chums.  I will try some of those out. Smoke makes things work. When the smoke gets out, it stops! |
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