I entered "sudo chmod 770 /" on terminal. Is it fixable?

Question

I was trying to deny permissions to access the root folder to all non sudoers, and had the (NOT) brilliant idea to run sudo chmod 770 /. Now I get permission denied for all commands.

I am running Ubuntu 15.10 on Virtual Box and the installation is encrypted.

How can I fix it?

I've read I can use a live environment to undo this but I don't know how to do it via Virtual Box, with an encrypted installation (I have the key, though). — Hugo Lobo, Jan 05 '16 at 04:59

score 4 · Answer 1 · edited Jan 05 '16 at 07:04

4

Luckily you haven't used -R option so you can easily revert it by following command:

sudo chmod 755 /

755 is the default permissions for the / directory.

edited Jan 05 '16 at 07:04

chaos

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answered Jan 05 '16 at 06:16

Yo Yo Saty Singh

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This won't work.. Sudo is inside root so executing it is not permitted since you can't get into the folder – avmohan Jun 11 '16 at 13:18

score 1 · Answer 2 · edited Apr 13 '17 at 12:24

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Was able to fix it by booting into a root shell following the procedure in the answer to this question: How do I boot into a root shell? And entering chmod 755 /.

edited Apr 13 '17 at 12:24

Community

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answered Jan 05 '16 at 05:42

Hugo Lobo

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I entered "sudo chmod 770 /" on terminal. Is it fixable?

2 Answers2