Linux: Run Cron Job on Reboot August 27th, 2017 Explains how to schedule a cron job to run after Linux / BSD system reboot or system startup using @reboot Vixie cron macro.
Unix / Linux: Run Cron Jobs on Last Day of Month October 11th, 2014 Cron jobs can be scheduled based on minute, hour, day of month, month or by the day of the week. Flexible as it may seem, there is actually no simple way to schedule a job to be run on the last day of every month.