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Comment on Anon sets up a prank at school

In university we were taught C programming. We started with simple things like loops and stuff. After a while the topic processes, threads & stuff came up and of course we were instructed to program that. In the computer lab there where only thin clients so everything actually run on the server.

A good friend of mine - not know what was about to happen - entered:

while (true) {
    fork();
}

Astoundingly it took a whole minute until the server froze. :D He got scolded by the sysadmin the next day but nothing serious happened.

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brotundspiele@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago
I’d scold the sysadmin instead for not cofiguring critical systems in a secure way. Ulimit exists for a reason.

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- tetris11@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago
  Huh. I never made that connection before. I always thought ulimit was to prevent excessive disk writes or something
  
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  - brotundspiele@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago
    ulimit -H -u 10 will (hard)limit the current process (the shell) to 10 subprocesses. You can also use it to limit the number of open files etc.
    
    To globally configure that for a user/group you’d use /etc/security/limits.conf instead.
    
    If you want to prevent users from filling up the disk, take a look into quota.
    
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Rubanski@lemm.ee ⁨3⁩ ⁨weeks⁩ ago
What does that command do?

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- MarsLife@lemmy.world ⁨3⁩ ⁨weeks⁩ ago
  Creates a new process. So, it would create an infinite amount of processes filling RAM.
  
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tetris11@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago
:(){ :|:& };:

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