this post was submitted on 07 Jul 2026
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509
Russian roulette [CommitStrip] (lemmy.world)
submitted 2 months ago* (last edited 2 months ago) by cannedtuna@lemmy.world to c/comicstrips@lemmy.world
37 comments fedilink hide all child comments
 

CommitStrip | website

Transcript7 panel comic

1: [2 guys, both in fur lined coats, one wearing a fur-lined hat, the other with crazy hair, sit in circular booth in a rundown bar. 2 empty shot glasses and a bottle are visible on the table.]

Hat: Stop it, you’re crazy! This isn’t you talking, it’s the vodka!

Hair: Leave it…

2: [The two men are sitting across from a third man in a similar fur-line coat and hat, but glasses and a beard. A laptop sits in front of the bearded man.]

Beard: It’s not a game for cowards…

3: [Hair pulls the laptop towards him. Hat looks worried]

Hair: Come on, gimme that and let’s get it over with!

4: [Hair has a crazy and excited look on his face]

Hair: Each one on his own prod server?

Beard: Each one on his own prod server.

5: [Close up of Hats finger clicking the touch pad]

6: [Close up of the sweat dripping down Hats face]

7: [A terminal is open on the laptop screen] Laptop reads: root@server:~# [ $[ $RANDOM % 6 ] == 0 ] && rm -rf / || echo β€œLucky boy”;

all 38 comments
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[–] billbasher@lemmy.world 108 points 2 months ago* (last edited 2 months ago) (2 children)

needs β€”no-preserve-root

[–] DaGeek247@fedia.io 122 points 2 months ago (2 children)

And also a short delay before printing 'lucky boy' so you can't tell if it's deleting everything or if it's the built in delay.

[–] EnsignWashout@startrek.website 64 points 2 months ago

That's brilliant...and sick.

[–] grrgyle@slrpnk.net 14 points 2 months ago (1 children)

Oh I do remember that sickening feeling when an rm doesn't come back immediately –_β€”

[–] froh42@lemmy.world 6 points 2 months ago* (last edited 2 months ago) (1 children)

I still remember when I managed to rm -rf / foo (I accidentally typed a space between / and foo) on my very early linux box on the 90s. 80486, 16 mb

I pressed enter. Saw what I did. Remembered that sync ran at every 30s* Pressed the power button.

*= those were simple times, but not better times

So I rm -rf ed my root fs and my box survived it due to the quick power off.

[–] grrgyle@slrpnk.net 2 points 2 months ago (1 children)

What's sync? I got into linux quite a bit later. So you mean like an incremental rsync backup? Whatever it was, it sounds like it saved you.

[–] froh42@lemmy.world 4 points 2 months ago* (last edited 2 months ago) (1 children)

it was an old mechanism in Unix & Linux that flushed "disk writes" to disk. Writes would normally go to the buffer cache in ram and a process called "sync" every 30s to flush out writes to disk. (writing out EVERY change would result in a lot of redundant writes and be very slow, so this was a very simple kind of collecting work until it makes sense to really do it)

We still write async writes to ram first and then write them to disk later, the mechanism is much more advanced nowadays - and also quicker to start writing.

Still, on the shell there's a command called sync which invokes the system call, asking the kernel to flush out all asynchronous writtes.

(And yes, there's more than async writes, used by databases for example, but that would require a lot more of explanations)

[–] grrgyle@slrpnk.net 1 points 2 months ago

Thanks for that explanation. I had no idea. And yeah I was just going to say, that sounds like how databases work.

[–] sun_is_ra@sh.itjust.works 10 points 2 months ago* (last edited 2 months ago) (1 children)

On modern Linux system yes but old Unix servers (or even recent?) would run it no problem

Edit: ~~It was initally introduced by sun microsystems in 2005 and was later adopted by GNU~~

Sun Microsystem didn't introduce it in 2005, rather it simply disallowed rm -rf / altogether

Later GNU introduced --preserve-root and after that made --preserve-root the default and added --no-preserve-root https://en.wikipedia.org/wiki/Rm_(Unix)

[–] nitroemdash@lemmy.wtf 5 points 2 months ago (1 children)

Except Alpine and other systems with BusyBox

[–] MonkderVierte@lemmy.zip 2 points 2 months ago

And BSD tooling.

[–] LowtierComputer@lemmy.world 56 points 2 months ago (3 children)

Can someone help and explain this to little old me?

[–] GargleBlaster@feddit.org 126 points 2 months ago* (last edited 2 months ago) (3 children)

In my limited knowledge it randomly generates a number and if this number can be cleanly divided by 6 it deletes everything on the system (and the system itself). If not it prints 'lucky boy'.

So basically the nerd version of russian Roulette. But with higher stakes

[–] tired_fedora@lemmy.ml 54 points 2 months ago

Higher stakes

LOL 🀭 quiet, mafia, IT is talking!

[–] albbi@piefed.ca 32 points 2 months ago (1 children)

But with higher stakes

I see you haven't been converted to believe in the afterlife. Restoring from backup.

[–] chaogomu@lemmy.world 21 points 2 months ago (4 children)

If the backup is on the same device, it's not a backup, and if you've not tested it on a clean machine, it's not a backup.

[–] Smoogs@lemmy.world 7 points 2 months ago

scuz me ill just grab this timeshift thumbdrive for this opportunity.

..amateurs.

[–] Zarobi@aussie.zone 1 points 2 months ago

Also, if you're not willing to actually use it to restore from backup, it's not a backup. I remember once I fucked up surgery on the prod db (we didn't have a testing db...) and was like, ok well at least we can just try again.

Boss man was like "no! We can't restore from backup, people will lose 1 hour of their work!!!" I spent 7 days writing a script to surgically fix my surgery instead. I had to fudge and guess some of the data but wcyd

[–] froh42@lemmy.world 1 points 2 months ago* (last edited 2 months ago)

zfs with snapshots + offsite sync for the win.

[–] fleem@piefed.zeromedia.vip 1 points 2 months ago

does deleting the whole lxc and restoring from the backup on the other machine count?

[–] captcha_incorrect@lemmy.world 1 points 2 months ago

Someone has asked this on stack overflow as well. https://stackoverflow.com/questions/51150276/linux-random-6-0

From link:
It's a Russian roulete in programming. $RANDOM returns a number between 0 and RAND_MAX. If the mod 6 on the returned number equals 0, the command after && (conditional execution) executes and it deletes the root directory, basically destroying everything you have on your disk with no normal way of retrieving it (the OS can't function). If this doesn't happen, the conditional execution after || happens and outputs You live.

[–] mushroommunk@lemmy.today 52 points 2 months ago (2 children)

It's a bash command that generates a random number. If that number divides by six with no remainder then it deletes everything on the server, if not it prints "lucky boy". "Prod" servers are production servers, the ones the actual business runs on, as opposed to test or dev servers which are often deleted and rebuilt as developers to see if things work or not.

This is Russian roulette for IT people to see if they destroy the running server or not

[–] SatyrSack@quokk.au 25 points 2 months ago* (last edited 2 months ago)

generates a random number. If that number divides by six with no remainder

Meaning a 1 in 6 chance, just like playing traditional Russian roulette with a revolver

EDIT: For fun, here is a Russian roulette bash script that doesn't actually do anything other than simply print pass or fail with a 1 in 6 chance:

[ $[ $RANDOM % 6 ] == 0 ] && echo fail || echo pass;
[–] MonkderVierte@lemmy.zip 1 points 2 months ago

It's a bash command

Yeah, weird layered square brackets.

[–] tired_fedora@lemmy.ml 10 points 2 months ago (1 children)

They're basically playing Russian Roulette with their servers. They condition a remove all command on a random numbers generator and pray. If it does not wipe the server, it spits out "Lucky Boy"

[–] LowtierComputer@lemmy.world 2 points 2 months ago (1 children)

Ooooh. Is this a Linux command?

[–] Hiro8811@lemmy.world 1 points 2 months ago* (last edited 2 months ago)

It's a probably a bash script or some script that generates a random number that if it's divisible by 6 it executes rm and if it's not it executes echo

[–] charokol@lemmy.world 31 points 2 months ago

The modulo devisor should reduce by one every time it’s run

[–] tal@lemmy.today 28 points 2 months ago (2 children)

  1. I'd hope that one's production server is backed up.

  2. $ alias rm="echo Lucky boy"; clear

    "Okay, ready to play."

[–] alastel@lemmy.ml 25 points 2 months ago (2 children)

alias rm="echo Lucky boy"

That would print "Lucky boy -rf /" though, quite suspicious

[–] black0ut@pawb.social 1 points 2 months ago

You could make an rm function in .bashrc and ignore the arguments. Idk if there's a way to ignore arguments with alias.

[–] Sergio@piefed.social 3 points 2 months ago (1 children)

I’d hope that one’s production server is backed up.

Yeah, all this means is that you're gonna have to spend time restoring from backup. Right?

[–] desmosthenes@lemmy.world 5 points 2 months ago

lol I disable this and root access first thing

[–] fubarx@lemmy.world 5 points 2 months ago

[–] Jinarched@lemmy.ca 2 points 2 months ago (1 children)

Unlucky boy

[–] nycvin@lemmy.world 2 points 2 months ago

Risky click of the day