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So I accidentally ran a script which used up all of the RAM on my ubuntu system, and I had to force it to power off. When I rebooted the system, programs would randomly segfault, even though I changed nothing and they had never done this before. How would I fix my server so that these programs start working again? I've already tried reinstalling them via APT, but that doesn't seem to help.

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  • Had to force it to power off? Why didn't you command the kernel to safely shutdown (ie. SysRq key + commands allow you to bypass any running programs/X/GUI etc and directly command the kernel?). You should never need to use the power-off button (except where kernel panic is involved; as then you can't direct the kernel to do anything as it's already dead). Given you powered your system off (unclean shutdown), did you fsck your system & check for logical errors?
    – guiverc
    Commented Aug 18, 2021 at 3:14
  • @guiverc I tried to fsck my system using the recommended method but I can't tell if it did anything, as bootup takes the same time with or without the "fsck check". Furthermore, the laptop running the server doesn't have a SysRq key, only a print screen key.
    – Epic Programmer
    Commented Aug 18, 2021 at 3:37
  • By a miracle another restart seems to have fixed all of the problems, so I'll be happy that it's not permanently dead.
    – Epic Programmer
    Commented Aug 18, 2021 at 3:40
  • Many modern keyboards don't have SysRq marked on the keys (as a majority of users never used the key, not having it marked made the device appear cleaner, eg. 2019-2021 dell laptops don't), but if you know where the key is - it still works (though some models require an extra Fn key to be pressed to get the SysRq key effect; but how the key is achieved is machine specific, esp. firmware on the machine).
    – guiverc
    Commented Aug 18, 2021 at 4:34

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