I accidentally locked my Ubuntu System. Now everything is read only. The closest i can remember which might have done this is, I was trying to change the authority of a fstab symllink with
chown -h myusername /db. Now everything is read only, file system, mounted volume, all except my home folder. Even when i open the file browser as admin i.e. sudo nautilus i can't create and change any file or folder.
What might have caused this? Help me turn things back to normal.