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submitted 1 week ago by Epzillon@lemmy.ml to c/linux@lemmy.ml

Today I just learned that systemctl --force --force reboot is a command. We had a computer we remotely connected to which got permission errors and bus errors when we tried to reboot it normally. For some reason the mentioned command did actually manage to shutdown the computer bit did not manage to reboot it correctly.

I wonder what the double --force flag actually accomplishes and what possibly could hinder a regular reboot in this scenario.

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[-] fortified_banana@beehaw.org 48 points 1 week ago

I always try to consult the man pages for these kind of questions (you can search by typing '/' in the man page). Here's what the systemctl manual has to say in the specifications for the --force option:

Note that when --force is specified twice the selected operation is executed by systemctl itself, and the system manager is not contacted. This means the command should succeed even when the system manager has crashed.

[-] GolfNovemberUniform@lemmy.ml 11 points 1 week ago

Weird choice tbh. I'd make --force --force a separate option if possible.

[-] Dirk@lemmy.ml 22 points 1 week ago

You just really force it.

It's like with -v in various applications. -v means "verbose", and -vv means "really verbose", and -vvv means "an ungodly amount of data printed to the terminal, so much that it might crash".

[-] kungen@feddit.nu 4 points 1 week ago

But that's all part of the same argument. If it was -f or -ff that'd make sense. Duplicate parameters are usually ignored in like all other programs I can think of.

[-] Dirk@lemmy.ml 8 points 1 week ago

The -vvv I know is the same as -v -v -v. Can't check right now, but is the short parameter -f? So maybe give -ff a try ...

[-] huginn@feddit.it 5 points 1 week ago

It's a dangerous command - I'd rather not run it by accidentally hitting the f key a second time.

[-] teawrecks@sopuli.xyz 3 points 1 week ago

I agree. Specifying the same param twice like this feels like it should be idempotent. Sometimes a final cmdline string is built by multiple tools concatenating their outputs together; if each one adds --force without any way to know if it's already been added elsewhere, this could lead to undesirable behavior.

Even --forceforce would be better.

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this post was submitted on 04 Sep 2024
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