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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 398 Weeks Ago, 6 Days Ago |
| Questions Answered: | 66690 |
| Tutorials Posted: | 66688 |
MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Animportantserviceprovidedbyanysystemistheabilitytorunapro- cessonapredeterminedschedulewithouthumanintertention. The“au- tomation”oftaskscanreducetheworkloadofthesystemadministrator significantly. Unfortunately Linux currently offers not one service but potentially three—cron, anacron, and systemd timer units. In about a page compare and contrast all three systems. Illustrate your discussionbyusingthesystemfiles/etc/anacronand/etc/crontab and by constructing equivalent systemd service and timer files.Notes:a. It says “compare” and “contrast”—so explain how they are the same and how they are different. b. Your answers must be written in your own words. c. Please use the specified system files to explain how scheduling is defined do not invent your own. d. Any technical term used must be explained. e. Do not discuss the package systemd-cron. Write and test the systemd service and timer files yourself. f. One way to test a crontab file or a anacrontab file, or sys- temd service and timer files is to use the date command as the command ultimately to be run the output from the command ef- fectively timestamps when it was run by your scheduler
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