What does this do? nobody can read any file? would sudo chmod 777 fix it at least to a usable system?
The trick is that you loose access to every file on the system. chmod is also a file. And ls. And sudo. You see where it's going. System will kinda work after this command, but rebooting (which by a coincidence is a common action for "fixing" things) will reveal that system is dead.
Yep. You could run chmod again to fix it (from a different OS / rescue USB), but that would leave all the permissions in a messy state - having everything set to 777 is incredibly insecure, and will also likely break many apps/scripts that expect more restrictive permissions. So the only way to fix this properly would be to reinstall your OS/restore from backups.
How are you gonna run chmod when you don't have permissions to use it anymore?
What does this do? nobody can read any file? would sudo chmod 777 fix it at least to a usable system?
The trick is that you loose access to every file on the system.
chmodis also a file. Andls. Andsudo. You see where it's going. System will kinda work after this command, but rebooting (which by a coincidence is a common action for "fixing" things) will reveal that system is dead.Yep. You could run chmod again to fix it (from a different OS / rescue USB), but that would leave all the permissions in a messy state - having everything set to 777 is incredibly insecure, and will also likely break many apps/scripts that expect more restrictive permissions. So the only way to fix this properly would be to reinstall your OS/restore from backups.
How are you gonna run chmod when you don't have permissions to use it anymore?