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I am trying to change the permissions of a folder on my PC and I mistakenly ran:

sudo chmod -R 777 /

without indicating the directory, and now sudo isn't working. It's showing:

/usr/bin/sudo must be owned by uid 0 and have the setuid

I tried some suggestions found on this forum and am able to fix it through the boot up recovery mode, but not most of the applications don't work. The Wi-Fi is not working anymore. It's showing:

No Wi-Fi adapter found

Also Software & Updates is not working anymore.

Is there anyone that can help me? I would appreciate that.

BeastOfCaerbannog
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Christaiwo
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  • Does this answer your question? /usr/bin/sudo must be owned by uid 0 and have the setuid bit set – karel Dec 18 '21 at 11:16
  • Restore files from a backup; or you can take note of what permissions/file-stats exist on those backup files & use that as a template of how to reverse the changes (that is possibly a good learning exercise)... An alternative is to re-install (which needn't overwrite files & it can auto re-install your manually installed if from Ubuntu repositories too if you don't format; but restore will be necessary if you're using server apps!) – guiverc Dec 18 '21 at 11:23

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