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Image from file system

Hi to all!
I’m new in using docker. I’d know if it is possible to create an image from the file system, I mean: I have a server centos 8 on which I created a paritcular environment, can I create an image of whole server?
Thank to all!

Mic

By an image, we refer to an OS image here, which is a file that contains the OS, your executables, and any data files that might be related to your programs, for use in an embedded system. You can think of the image as a small “filesystem”; it has a directory structure and some files in it.