Extract the UBIFS images from a UBI image.

Source: https://github.com/jrspruitt/ubi_reader/blob/master/README.md#extracting-images

sudo apt-get install ubi_reader

ubireader_extract_files [options] path/to/file

The script accepts a file with UBI or UBIFS data in it, so should work with a NAND dump. It will search for the first occurance of UBI or UBIFS data and attempt to extract the contents. If file includes special files, you will need to run as root or sudo for it to create these files. With out it, it'll skip them and show a warning that these files were not created.