Once you've copied your image files back over to the new card, eject and put into your Pi and boot - n.b. Put the new card in, unmount the partitions and then useīE VERY CAREFUL that you know which devices your old memory card mounts on - you don't want to overwrite the system you are running.

If you create a new bigger sd card with octopi on, you can then copy those image files back. img files are now on your home directory, that's what ~/ means along with the filename. The rootfs copy will take much longer because the partition is 8GB - or 16GB, or however big the partition is. 'if' means input file and 'of' means output file This means the device 'file' is still there and its this that you use in the dd command.Īssuming the machine you are using has plenty of disk space you can just create images of each sd card partition doing this: To unmount the partitions without ejecting the card type ' sudo umount /dev/sdb1' then ' sudo umount /dev/sdb2'. So lets work with /dev/sdb1 and /dev/sdb2 as examples. Its outside this post to explain the difference as its deep into Linux devices and naming, but if you eject the card, the devices disappear. If you've mounted them in an mmc slot in a laptop as I have just done, the devices are /dev/mmcblk0p1 for the boot and /dev/mmcblk0p2 for the rootfs.

username is whatever you are logged in as, if you are using a Pi it will be /media/pi/boot. You are looking for something like /dev/sdb1 in the first column and /media/username/boot in the last column - that's the boot partition - and there'll be another /dev/sdb2 with /media/username/rootfs - that's the root partition. Type 'df' and you'll get a report of the disk file system usage. If you have mounted the card using a USB sd card reader the first thing we need to find are the devices: I promised the dd commands although we can see that /var/log had a lot in from the screenshots.

Command to check memory slot on linux