I am currently using Ubuntu 18.04. Yesterday I noticed that there were some files in the root directory that I accidentally pasted in there a long time ago and wanted to remove those files. So I opened the terminal to give 'rwx' access for the root directory (stupid decision). I typed in the code '''sudo chmod 744 /'''. The system immediately gave me an error and all icons disappeared but I could still navigate around the desktop and between desktop and applications using my mouse, just couldn't open anything. I then tried to shut down and restart the laptop. On restarting, the boot process got stuck at the 5 red dots screen. I could still seeing the white dots changing to red dots so it hadn't freezed. But it didn't move past the red dots screen even after waiting for an hour. I have tried to reboot the laptop many times since yesterday but it always gets stuck at that screen again and again. Please help.
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