Wrong mv comand :(

Wrong mv comand :(

I have an Ubuntu Desktop used as a Server. This morning I accidentally
moved all my root to ../
mv /* ../
mv: cannot move "/dev" to "../dev": Device or resource busy
mv: cannot move "/proc" to "../proc": Device or resource busy
mv: cannot move "/run" to "../run": Device or resource busy
mv: cannot move "/sys" to "../sys": Device or resource busy
mv: cannot move "/tmp" to a subdirectory of itself "../tmp"
root@server:/# ls
-bash: /bin/ls: No such file or directory
Where has the root directory been moved? How can I restore it? What can I
do :(?