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I am running the ubuntu desktop server on my old computer and after a few months of not using it, I plugged it back in and started getting errors like this for a good number of the commands I use regularly.

  1. When I type "ping 8.8.8.8" I get (-bash: /bin/ping: Input/output error)
  2. When I type "ssh -CX username@ip address" I get (-bash: /usr/bin/ssh: Input/output error)
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  • Machines are generally used as desktops, or as servers. You've provided no release details and made it unclear. I'd assume you have drive issues though (I/O errors on your local file system). I'd SysRq reboot and boot 'live' media & explore your drive health (help.ubuntu.com/community/Smartmontools) . Note I don't know what system you're using, nor what data you have - thus I may perform some tasks before reboot first (ie. I'd reboot first if desktop, think about it if a server considering what machine is running & likely explore logs before reboot & do checks)
    – guiverc
    Jul 14, 2020 at 5:26

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Your disk / file system may have issues. Check your kernel log (journalctl -kn 100) if possible. If you are unable to run the command, use a live system and journalctl -D xxx -n 1000 to see if you can get the log.

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