linux backup?

Question

linux

There is a gps-tracker on linux, before the update I would like to take an image on an external screw.
Is it possible to implement a backup using native functionality or commands (for example, "dd")?
Or will it be easier to fill in some kind of backup software on the screw?

Answer 1

Is it possible with native functionality

If it is there, then obviously it is.
The firmware also depends on the model.

Answer 2

Is it possible with native functionality

Undoubtedly

tar -cvpzf /`hostname`.tar.gz --exclude=/`hostname`.tar.gz --exclude=/swap --one-file-system /

Answer 3

Through dd of course you can. But the image will turn out:
- the size of a screw
- can only be restored to the same screw (or with the same geometry)
There is a dump command for backup