What must an administrator do to prevent new telnet users from connecting to the system?（）
- A、rmdev -l /dev/pts
- B、touch /etc/nologin
- C、chdev -l sys0 -a nologin
- D、chuser -a login=false ALL
正确答案:B
答案解析:有
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What must an administrator do to prevent new telnet users from connecting to the system?（）
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