lk/basics/kill.md

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---
title: "kill"
tags: [ "Documentation", "basics" ]
---
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If you want to kill a program in a graphical environment, open a terminal and typeL
## Graphical Programs
> xkill
Then click on the application which you want to kill.
## All Programs
To kill a program, find it with:
> pgrep discord
This will give you the UUID, e.g. `19643`.
Kill the program with:
> kill 19643
## Types of Kill
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To see an ordered list of termination signals:
> kill -l
1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL 5) SIGTRAP
6) SIGABRT 7) SIGBUS 8) SIGFPE 9) SIGKILL 10) SIGUSR1
11) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM
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You can select these levels with a '- number'.
Higher numbers are roughly equivalent to insistence.
For example:
> kill -1 3498
This roughly means 'maybe stop the program, if you can, maybe reload'.
Or the famous:
> kill -9 3298
This means 'kill the program dead, now, no questions, dead'.
**Beware** - if Firefox starts another program to connect to the internet, and you `kill -9 firefox`, this will leave all of Firefox's internet connection programs ("children") still there, but dead and useless.
- A dead program which sits there doing nothing is known as a 'zombie'.
- A program which is run by another program is called a 'child program'.
- A child whose parent program is dead is called an 'orphan'.
- A child who remains running despite being useless because the parent is dead is called an 'orphan zombie'.