Acronis True Image can capture an accurate backup while the system is running. All of the answers below except the one that mentions Ghost for linux fail because they don't actually replace the functionality of Acronis and Ghost.
In this tutorial, we’ll discuss how we can create an image of our Linux machine and restore it later on. First, we’ll start with the popular Clonezilla suite to create a complete system image and deploy it. Then, we’ll take a look at the
ManageEngine OS Deployeris a robust disk imaging solution designed for seamless operating system deployment across global networks. Administrators can capture images of different OS versions and store them in a network share for easy deployment. The tool