Source: How to create a cron job using Bash automatically without the interactive editor?
Does crontab have an argument for creating cron jobs without using the editor (crontab -e). If so, What would be the code create a cronjob from a Bash script?
getting the date in crontab command - The UNIX and Linux Forums
date +"%Y%m%d" -> date +"\%Y\%m\%d"
man crontab
The sixth field of a line in a crontab file is a string that is executed by the shell at the specified times. A percent character in this field (unless escaped by \) is translated to a NEWLINE character.
Do You Make These Cron Job Mistakes?
A system administrator can decide which user can run cron jobs and which users cannot. So to deny a user from executing a cron job, sysadmin might have placed your username in the /etc/cron.deny file.
If you have root privilege, check the /etc/cron.deny file to make sure your name is not listed in there. If it is listed, edit the file and remove your name. If you don’t have root privilege contact your sysadmin.
Crontab Issue: Cron Job is Not Working When Using Percentage
Question: What is the reason my cron job does not gets executed when i use percentage ‘%’ in my cron job. How to solve this issue ?