• Crontab’s maintained for user by user basis
• Edit crontab: crontab -e
• List the crontab: crontab -l
• Remove all the crontab commands: crontab -r

Time

• Lowest resolution that crontab can achieve is the minute
• Format: minute hour day_of_a_month month_of_a_year day_of_a_week THE_COMMAND_TO_EXECUTE
  • minute : 0-59
  • hour : 0-23
  • day_of_a_month : 1-31
  • month_of_a_year: 1-12
  • day_of_a_week : 0-7
    • 0 or 7 is Sunday and 6 is Saturday