Due hardware problems, I'm unable to use any pre-boot software (u-boot, recovery-boot, backupmenu). I'm tired of configuring after reflash and I'd rather create an image to restore. It doesn't matter for me by which tools it's made, as long as they're feasible on a Linux box. What's the best way to do it? I thought about dd-ing rootfs and optfs, but it doesn't sound optimal to me.