Yesterday i tried to change the `/usr` folder with an old one saved in Time Machine,
I type this in the terminal (to keep a copy of /usr folder) :
# mv /usr /usr-copy
After that nothing work, I decided to reboot (and I've forgotten to rename the /usr-copy in /usr, I was tired), so now there's is no /usr folder at all!
I have this message on each reboot :
You need to restart yout computer.
Hold down the Power button until it turns off, then press the Power button again
I cannot access to any other things like a menu... just the message reboot and hold f11 doesn't work.
Is there a way to access the terminal, where I can type "# mv /usr-copy /usr" ?