ttysnoop tty0: Cannot connect to server. Is it really a valid socket?

0

2

Ubuntu Server 14.04.3

vl@ns1:~$ sudo ttysnoop pts/0
Cannot connect to server. Is it really a valid socket?
vl@ns1:~$ sudo ttysnoop tty
Cannot connect to server. Is it really a valid socket?
vl@ns1:~$ sudo ttysnoop tty0
Cannot connect to server. Is it really a valid socket?
vl@ns1:~$ sudo ttysnoop tty1
Cannot connect to server. Is it really a valid socket?
vl@ns1:~$ sudo ttysnoop tty2
Cannot connect to server. Is it really a valid socket?
vl@ns1:~$ sudo ttysnoop tty3
Cannot connect to server. Is it really a valid socket?
vl@ns1:~$ sudo ttysnoop tty4
Cannot connect to server. Is it really a valid socket?

объясните пожалуйста как правильно указать имя консоли? нужно подключиться к системной консоли (к той, которая на монитор выводится после запуска ОС)