题目内容

.关于计划任务命令,()是不正确的。

A. 当日晚11点执行clear命令,使用at命令:at23:00todayclear;
B. 每年1月1日早上6点执行date命令,使用at命令:at6amJan1date;
C. 每日晚11点执行date命令,crontab文件中应为:023***date;
D. 每小时执行一次clear命令,crontab文件中应为:0*/1***clear;

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