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I changed (through chmod) the permission of /bin to 770. Now, ubuntu does not boot. How do I fix this problem?

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Try running recovery mode. If I am not wrong it must boot. (I made the same mistake years ago)

If I am wrong, Ubuntu Disc may help you repair this too.

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Boot off a CD or get to a console and change it back to 755.

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Thanks for the help. Using chroot, I changed the permission back to 755. Now, ubuntu boots but gets stucked at the "loading" screen. I am able to access shell through recovery mode but how do I load the OS? – SilverTiger Apr 12 '12 at 0:38
If you changed the files in the directory to 770 as well, you'll need to change those back to 755 as well. The symlinks should be 777. – micahg Apr 12 '12 at 3:10
Thanks guys. I changed the permission of files as well. Its working now. – SilverTiger Apr 12 '12 at 23:30
Can you explain how to do this for future users? – hexafraction Aug 18 '12 at 16:34

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