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15.You notice that your server load is exceptionally high during the hours of 10 am to 12 noon. When investigating the cause, you suspect that it may be a cron job scheduled by one of your users. What command can you use to determine if your suspicions are correct?

crontab –u
crond –u
crontab –l
crond –l

Explanation: The –l option used with the crontab command is used to list the users crontab file. This command must be run as root to list all users’ crontab files.

Reference: http://www.oreillynet.com/linux/cmd/c/crontab.html

Incorrect Answers
A: The –u option is used to specify which users crontab file will be acted upon.
B: Crond is the cron daemon responsible for running the cron jobs.
D: Crond is the cron daemon responsible for running the cron jobs.
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