单选题查看root用户的cron计时器设置的命令是（）。Acrontab-u root -lBcrontab -lCcrontab -u root -eDcrontab -u root -r
单选题
查看root用户的cron计时器设置的命令是（）。
A
crontab-u root -l
B
crontab -l
C
crontab -u root -e
D
crontab -u root -r
参考解析
解析：
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