Home » LPI » 117-201 » Which of the following commands will work?
You have written a script called usrs to parse the passwd file and create a list of usernames. You want to have this run at 5 am tomorrow so you can see the results when you get to work. Which of the following commands will work?
A. at 5:00 wed usrs
B. at 5:00 wed -b usrs
C. at 5:00 wed -l usrs
D. at 5:00 wed -d usrs
Correct Answer: A
Explanation/Reference:
Explanation: The ‘at’ command is used to execute commands at a specified time and optional date. It can contain an optional date, formed as a month and date, a day of the week, or a special keyword (today or tomorrow). An increment can also be specified.
Reference: http://www.oreillynet.com/linux/cmd/a/at.html
Incorrect Answers
B:No options are required to run the script at the specified time. Furthermore, the options should be specified before the time and date, not after them.
C:No options are required to run the script at the specified time. Furthermore, the options should be specified before the time and date, not after them.
D:No options are required to run the script at the specified time. Furthermore, the options should be specified before the time and date, not after them.
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