Linux系统中，编辑/etc/securetty文件，将其中tty1前面增加#注释，然后保存，则可以实现：()

linux系统中存放加密用户帐号信息的文件是（）

A./etc/passwd

B./etc/shadow

C./etc/group

D./etc/securetty

A.usermod-s/sbin/nologinsync

B.usermod-L/sbin/nologinsync

C.编辑/etc/passwd文件，直接将sync用户的登录shell修改为/sbin/nologin

D.passwd–lsync

A./etc/rc.d/rc.inet2

B./etc/rc.d/rc.inet1

C./etc/dhcpd.conf

D./etc/rc.d/rc.S

A./

B./root

C./home

D./etc

在Unix/Linux系统中，使用/etc/shadow文件而不是/etc/password文件保存用户口令，被称为影子口令模式。()

A./etc/passwd

B./etc/shadow

C./etc/group

D./etc/securetty

A./dev

B./etc

C./root

D./file

A./etcarch

B./etc/domain

C./etc/nameserver

D./etc/resolv.conf

A./etc

B./etc/passwd

C./bin

D./tmp

A./etc/hostname

B./etc/hosts

C./etc/resolv.conf

D./etc/host.conf