Not login to system due to changing permission [closed]

I am using Linux system but by mistake I fired a chmod command as follows:-

chmod -R 777 /

after that I restart my System. But when I try to login, the system is login but after 2-3 seconds again to login window. Please help me to solve this problem.

Answer

Just get your important files and configs backup them. format the partition which the OS installed, then reinstall again, sorry there is no easy way to correct these permissions.