How can the administrator use file ’a’ containing ’-El sys0’ to view the attributes of a device（）？  

A.Power 595
B.Power 560
C.Power 570
D.Power 550

A.The sshd user id is locked.
B.The /var/empty directory needs to be created.
C.PRNG is set to ’no’ in the /etc/ssh/sshd_config file.
D.The permissions on /dev/random and /dev/urandom are incorrect.

A.rmdev -l /dev/pts
B.touch /etc/nologin
C.chdev -l sys0 -a nologin
D.chuser -a login=false ALL