[Arm-dev] SD backup and restore

Hello: Just curious if anybody has a known working solution (for Linux, not Windows) to backup and restore the SD card. In particular one that will shrink the image and only use the space utilized on the card itself, and allow restoring to a different size SD card. I figure there might be a process to create the images that are provided for this distro, but I'm unable to figure out how they are created.

I've been searching for and trying various scripts for other distros, and so far no luck in getting a working solution for this CentOS distro.

Thank you very much.

-- Chris