I am Benjamin. I contact you as our tech staff have released an open source script to backup Linux servers that I think it is interesting for you as you have writen about that topic in the past.
BERA (Backup Easy & Recover Anywhere) hast the advantatge that not only backups files/folders but also server configurations, users, crontabs, iptables, websites… all you need to fully recover a server in minutes. Our tech staff is been using it for years to backup, migrate servers, including servers in production. We now share this tool under GPL license and hope it is so useful for open source community as it is for us. Further information (including demo video):
Please, contact me for any question
Thanks for your time 😉