Acronis True Image Echo Enterprise The Installation Was Interrupted How To Backup Linux Ubuntu Server?

How to backup linux ubuntu server? - acronis true image echo enterprise the installation was interrupted

Hello. We have a VoIP server in the office and can not understand how you can come back. The way I think is to use a program such as Acronis ® True Image Echo ™ Server for Linux, but the cost of the dam much, you need a free piece of software or other backup drive or determined. I must be able to save the image to a disk and extrenal it does not bother me, my hands dirty with some coding if necessary, or whatever. Thank you for your help in advance!