Running a daily backup to backup website via a cronjob

I need to do the above but all posts just point to: https://www.inmotionhosting.com/support/community-support/tools/how-to-schedule-backups-with-a-cron-job

I am not the most tech savvy guy and would appreciate it if a 'ready made' working script could be provided to achieve the running a daily backup to backup website via a cronjob.

Thanks,

Jonathan