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Some backstory. I wanted to make a command block that had a simple command when placed: Kill all users and set block to air to stop the trigger.
However, I had no idea how to make it so a command block had commands already input on place.
Is this possible? (Version 1.16.5)

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You can do this from scratch with /setblock:

setblock 12 23 34 minecraft:command_block[]{Command:"…"}

Your command goes inside those quotation marks right there.

If you are looking to get this command block as an inventory item, use BlockEntityTag like so:

give @p minecraft:command_block{BlockEntityTag:{Command:"…"}}

Beware as you will need to escape quotation marks in your inner command, which can lead to messes like these!

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  • Primarily beware to make the block self-destruct as intended, because an always-active /kill @p is a recipe for a disaster. – SF. May 4 at 21:30
  • Ok, yeah this is what I need. TIme to make a death blocc >:D – Eris Starmaster May 6 at 16:48
  • Seems I found an easier solution. A hack client, Wurst, let's you do it with Creative mode. – Eris Starmaster May 26 at 12:23
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So make the command block with the command to make it so it kills when placed and set to always active then I think it hold shift and click the block and the code should stay in the command block.

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    Hm. If this works, I have to test it. Ill get a chance later on. – Eris Starmaster May 4 at 17:44
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    No, this won't work unfortunately. Holding shift and clicking on the block breaks it. Perhaps you meant Ctrl + middle click? – ExpertCoder14 May 4 at 19:20
  • @ExpertCoder14 Have you tried this yourself, all questions vary by being unique. – Wabbit. May 4 at 20:09
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    @Wabbit shift+left cliick in creative mode is a regular 'destroy block while crouching', and it acts on command blocks just the same as on dirt. – SF. May 4 at 21:27
  • @Wabbit. what do you even mean? He said it wouldn't work and your response is... I'm not even sure tbh. – Penguin May 4 at 21:47

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