问题
I accidentally executed the following command:
sudo chmod -R 0700 /lib
Now every single command (even with sudo) gives me a 'permission denied' (even simple commands like 'ls'). I got told because all the important executable files in the lib folder are not executable anymore.
Basically my system is blocked. Is there a way to restore this (it is a server so reinstalling is not an option)?
来源：https://stackoverflow.com/questions/33281896/sudo-chmod-permission-denied