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fatal error, unable to load plugins "sudo error in linux mint"

I am facing an issue when I am installing python packages:

The error is:

sudo: error in /etc/sudo.conf, line 0 while loading plugin `sudoers_policy'
sudo: /usr/lib/sudo/sudoers.so must be only be writable by owner
sudo: fatal error, unable to load plugins
Solution

  • The file has the wrong permissions, it should ONLY be writable by the owner, and its currently not.

    To confirm that run:

    ls -l /usr/lib/sudo/sudoers.so

    When the permissions are correct, that should print '-rw-r--r--':

    -rw-r--r-- 1 root root 316768 Jul  4  2017 /usr/lib/sudo/sudoers.so

    To fix the issue (as long as you are root) run:

    sudo chmod 644 /usr/lib/sudo/sudoers.so