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Accepted
yang mandi
Asked: 2021-06-29 09:51:11 +0800 CST

Ran chmod 764 /usr folder

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I ran sudo chmod 764 /usr and then my laptop rebooted, now I can't open Ubuntu login screen anymore. Help me please.

Edit:

I solved it! Boot in recovering mode and then open root console. I wrote chmod 755 /usr and then rebooted.

20.04

1 Answers

  1. Best Answer

    Try booting from an usb Ubuntu, mount the partition and chmod /usr to 755 for a start. Then, you will need to figure out case by case once something fails.

    Good luck.

    Extra info: in an almost fresh 20.04 desktop install (on a virtual machine I have)

    find /usr | wc -l

    gives about 177K files :-)

    If you put in a bash shell file...

    find /usr | while read aa; do echo $aa; stat -c "%a %n" $aa; done

    you will get a list of current file perms, and you could redirect that to a file as a safe measure.

    regards, JP.

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