关于这门考题，你需要知道以下信息：
考试代号：000-103
认证名称：AIX 6.1 Basic Operations
版本号：V8.02
考题数量：81道
更新日期：2010-8-14
1. An operator needs to schedule the script '/usr/scripts/listall.ksh' to run at 19.00 on the current day. What is the correct form of the 'at' command to accomplish this task?
A. at 7 /usr/scripts/listall.ksh
B. at 7 P /usr/scripts/listall.ksh
C. at now + 7 /usr/scripts/listall.ksh
D. at today + 7 p /usr/scripts/listall.ksh
Answer: B
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